diff --git a/Classes/PHPExcel/Calculation.php b/Classes/PHPExcel/Calculation.php
index 86a2f1e..ae84b2b 100644
--- a/Classes/PHPExcel/Calculation.php
+++ b/Classes/PHPExcel/Calculation.php
@@ -2630,11 +2630,11 @@ class PHPExcel_Calculation {
 //				echo 'Element is a Percentage operator<br />';
 				$stack->push('Unary Operator','%');							//	Put a percentage on the stack
 				++$index;
-			} elseif ($opCharacter == '+' && !$expectingOperator) {			//	Positive (rather than plus) can be discarded?
+			} elseif ($opCharacter == '+' && !$expectingOperator) {			//	Positive (unary plus rather than binary operator plus) can be discarded?
 //				echo 'Element is a Positive number, not Plus operator<br />';
 				++$index;													//	Drop the redundant plus symbol
-			} elseif (($opCharacter == '~') && (!$isOperandOrFunction)) {					//	We have to explicitly deny a tilde, because it's legal
-				return $this->_raiseFormulaError("Formula Error: Illegal character '~'");	//		on the stack but not in the input expression
+			} elseif ((($opCharacter == '~') || ($opCharacter == '|')) && (!$isOperandOrFunction)) {	//	We have to explicitly deny a tilde or pipe, because they are legal
+				return $this->_raiseFormulaError("Formula Error: Illegal character '~'");				//		on the stack but not in the input expression
 
 			} elseif ((isset(self::$_operators[$opCharacter]) or $isOperandOrFunction) && $expectingOperator) {	//	Are we putting an operator on the stack?
 //				echo 'Element with value '.$opCharacter.' is an Operator<br />';
@@ -3278,7 +3278,7 @@ class PHPExcel_Calculation {
 //					echo 'Token is a PHPExcel constant: '.$excelConstant.'<br />';
 					$stack->push('Constant Value',self::$_ExcelConstants[$excelConstant]);
 					$this->_writeDebug('Evaluating Constant '.$excelConstant.' as '.$this->_showTypeDetails(self::$_ExcelConstants[$excelConstant]));
-				} elseif ((is_numeric($token)) || (is_bool($token)) || (is_null($token)) || ($token == '') || ($token{0} == '"') || ($token{0} == '#')) {
+				} elseif ((is_numeric($token)) || (is_null($token)) || (is_bool($token)) || ($token == '') || ($token{0} == '"') || ($token{0} == '#')) {
 //					echo 'Token is a number, boolean, string, null or an Excel error<br />';
 					$stack->push('Value',$token);
 				// if the token is a named range, push the named range name onto the stack
diff --git a/Classes/PHPExcel/Reader/Excel5.php b/Classes/PHPExcel/Reader/Excel5.php
index a2b9b5d..97c2cd8 100644
--- a/Classes/PHPExcel/Reader/Excel5.php
+++ b/Classes/PHPExcel/Reader/Excel5.php
@@ -570,7 +570,7 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 		if (!$this->_readDataOnly) {
 			foreach ($this->_objFonts as $objFont) {
 				if (isset($objFont->colorIndex)) {
-					$color = self::_readColor($objFont->colorIndex,$this->_palette);
+					$color = self::_readColor($objFont->colorIndex,$this->_palette,$this->_version);
 					$objFont->getColor()->setRGB($color['rgb']);
 				}
 			}
@@ -580,12 +580,12 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 				$fill = $objStyle->getFill();
 
 				if (isset($fill->startcolorIndex)) {
-					$startColor = self::_readColor($fill->startcolorIndex,$this->_palette);
+					$startColor = self::_readColor($fill->startcolorIndex,$this->_palette,$this->_version);
 					$fill->getStartColor()->setRGB($startColor['rgb']);
 				}
 
 				if (isset($fill->endcolorIndex)) {
-					$endColor = self::_readColor($fill->endcolorIndex,$this->_palette);
+					$endColor = self::_readColor($fill->endcolorIndex,$this->_palette,$this->_version);
 					$fill->getEndColor()->setRGB($endColor['rgb']);
 				}
 
@@ -597,27 +597,27 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 				$diagonal = $objStyle->getBorders()->getDiagonal();
 
 				if (isset($top->colorIndex)) {
-					$borderTopColor = self::_readColor($top->colorIndex,$this->_palette);
+					$borderTopColor = self::_readColor($top->colorIndex,$this->_palette,$this->_version);
 					$top->getColor()->setRGB($borderTopColor['rgb']);
 				}
 
 				if (isset($right->colorIndex)) {
-					$borderRightColor = self::_readColor($right->colorIndex,$this->_palette);
+					$borderRightColor = self::_readColor($right->colorIndex,$this->_palette,$this->_version);
 					$right->getColor()->setRGB($borderRightColor['rgb']);
 				}
 
 				if (isset($bottom->colorIndex)) {
-					$borderBottomColor = self::_readColor($bottom->colorIndex,$this->_palette);
+					$borderBottomColor = self::_readColor($bottom->colorIndex,$this->_palette,$this->_version);
 					$bottom->getColor()->setRGB($borderBottomColor['rgb']);
 				}
 
 				if (isset($left->colorIndex)) {
-					$borderLeftColor = self::_readColor($left->colorIndex,$this->_palette);
+					$borderLeftColor = self::_readColor($left->colorIndex,$this->_palette,$this->_version);
 					$left->getColor()->setRGB($borderLeftColor['rgb']);
 				}
 
 				if (isset($diagonal->colorIndex)) {
-					$borderDiagonalColor = self::_readColor($diagonal->colorIndex,$this->_palette);
+					$borderDiagonalColor = self::_readColor($diagonal->colorIndex,$this->_palette,$this->_version);
 					$diagonal->getColor()->setRGB($borderDiagonalColor['rgb']);
 				}
 			}
@@ -4229,7 +4229,7 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 				case 0x14:
 					// offset: 16; size: 2; color index for sheet tab
 					$colorIndex = self::_GetInt2d($recordData, 16);
-					$color = self::_readColor($colorIndex,$this->_palette);
+					$color = self::_readColor($colorIndex,$this->_palette,$this->_version);
 					$this->_phpSheet->getTabColor()->setRGB($color['rgb']);
 					break;
 
@@ -4665,7 +4665,7 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 			case 'tAdd': // addition
 			case 'tConcat': // addition
 			case 'tDiv': // division
-			case 'tEQ': // equaltiy
+			case 'tEQ': // equality
 			case 'tGE': // greater than or equal
 			case 'tGT': // greater than
 			case 'tIsect': // intersection
@@ -5373,7 +5373,7 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 	private function _readBIFF8CellAddress($cellAddressStructure)
 	{
 		// offset: 0; size: 2; index to row (0... 65535) (or offset (-32768... 32767))
-			$row = self::_GetInt2d($cellAddressStructure, 0) + 1;
+		$row = self::_GetInt2d($cellAddressStructure, 0) + 1;
 
 		// offset: 2; size: 2; index to column or column offset + relative flags
 
@@ -6124,11 +6124,9 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 	 */
 	private static function _GetInt4d($data, $pos)
 	{
-		//return ord($data[$pos]) | (ord($data[$pos + 1]) << 8) |
-		//	(ord($data[$pos + 2]) << 16) | (ord($data[$pos + 3]) << 24);
-
 		// FIX: represent numbers correctly on 64-bit system
 		// http://sourceforge.net/tracker/index.php?func=detail&aid=1487372&group_id=99160&atid=623334
+		// Hacked by Andreas Rehm 2006 to ensure correct result of the <<24 block on 32 and 64bit systems
 		$_or_24 = ord($data[$pos + 3]);
 		if ($_or_24 >= 128) {
 			// negative number
@@ -6146,7 +6144,7 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 	 * @param array $palette Color palette
 	 * @return array RGB color value, example: array('rgb' => 'FF0000')
 	 */
-	private static function _readColor($color,$palette)
+	private static function _readColor($color,$palette,$version)
 	{
 		if ($color <= 0x07 || $color >= 0x40) {
 			// special built-in color
@@ -6156,7 +6154,7 @@ class PHPExcel_Reader_Excel5 implements PHPExcel_Reader_IReader
 			return $palette[$color - 8];
 		} else {
 			// default color table
-			if ($this->_version == self::XLS_BIFF8) {
+			if ($version == self::XLS_BIFF8) {
 				return self::_mapColor($color);
 			} else {
 				// BIFF5
diff --git a/Classes/PHPExcel/Shared/OLE.php b/Classes/PHPExcel/Shared/OLE.php
index a7cc9c3..a5c8dd1 100644
--- a/Classes/PHPExcel/Shared/OLE.php
+++ b/Classes/PHPExcel/Shared/OLE.php
@@ -111,36 +111,36 @@ class PHPExcel_Shared_OLE
 			throw new Exception("Only Little-Endian encoding is supported.");
 		}
 		// Size of blocks and short blocks in bytes
-		$this->bigBlockSize = pow(2, $this->_readInt2($fh));
-		$this->smallBlockSize  = pow(2, $this->_readInt2($fh));
+		$this->bigBlockSize = pow(2, self::_readInt2($fh));
+		$this->smallBlockSize  = pow(2, self::_readInt2($fh));
 
 		// Skip UID, revision number and version number
 		fseek($fh, 44);
 		// Number of blocks in Big Block Allocation Table
-		$bbatBlockCount = $this->_readInt4($fh);
+		$bbatBlockCount = self::_readInt4($fh);
 
 		// Root chain 1st block
-		$directoryFirstBlockId = $this->_readInt4($fh);
+		$directoryFirstBlockId = self::_readInt4($fh);
 
 		// Skip unused bytes
 		fseek($fh, 56);
 		// Streams shorter than this are stored using small blocks
-		$this->bigBlockThreshold = $this->_readInt4($fh);
+		$this->bigBlockThreshold = self::_readInt4($fh);
 		// Block id of first sector in Short Block Allocation Table
-		$sbatFirstBlockId = $this->_readInt4($fh);
+		$sbatFirstBlockId = self::_readInt4($fh);
 		// Number of blocks in Short Block Allocation Table
-		$sbbatBlockCount = $this->_readInt4($fh);
+		$sbbatBlockCount = self::_readInt4($fh);
 		// Block id of first sector in Master Block Allocation Table
-		$mbatFirstBlockId = $this->_readInt4($fh);
+		$mbatFirstBlockId = self::_readInt4($fh);
 		// Number of blocks in Master Block Allocation Table
-		$mbbatBlockCount = $this->_readInt4($fh);
+		$mbbatBlockCount = self::_readInt4($fh);
 		$this->bbat = array();
 
 		// Remaining 4 * 109 bytes of current block is beginning of Master
 		// Block Allocation Table
 		$mbatBlocks = array();
 		for ($i = 0; $i < 109; ++$i) {
-			$mbatBlocks[] = $this->_readInt4($fh);
+			$mbatBlocks[] = self::_readInt4($fh);
 		}
 
 		// Read rest of Master Block Allocation Table (if any is left)
@@ -148,10 +148,10 @@ class PHPExcel_Shared_OLE
 		for ($i = 0; $i < $mbbatBlockCount; ++$i) {
 			fseek($fh, $pos);
 			for ($j = 0; $j < $this->bigBlockSize / 4 - 1; ++$j) {
-				$mbatBlocks[] = $this->_readInt4($fh);
+				$mbatBlocks[] = self::_readInt4($fh);
 			}
 			// Last block id in each block points to next block
-			$pos = $this->_getBlockOffset($this->_readInt4($fh));
+			$pos = $this->_getBlockOffset(self::_readInt4($fh));
 		}
 
 		// Read Big Block Allocation Table according to chain specified by
@@ -160,7 +160,7 @@ class PHPExcel_Shared_OLE
 			$pos = $this->_getBlockOffset($mbatBlocks[$i]);
 			fseek($fh, $pos);
 			for ($j = 0 ; $j < $this->bigBlockSize / 4; ++$j) {
-				$this->bbat[] = $this->_readInt4($fh);
+				$this->bbat[] = self::_readInt4($fh);
 			}
 		}
 
@@ -169,7 +169,7 @@ class PHPExcel_Shared_OLE
 		$shortBlockCount = $sbbatBlockCount * $this->bigBlockSize / 4;
 		$sbatFh = $this->getStream($sbatFirstBlockId);
 		for ($blockId = 0; $blockId < $shortBlockCount; ++$blockId) {
-			$this->sbat[$blockId] = $this->_readInt4($sbatFh);
+			$this->sbat[$blockId] = self::_readInt4($sbatFh);
 		}
 		fclose($sbatFh);
 
@@ -225,7 +225,7 @@ class PHPExcel_Shared_OLE
 	 * @return  int
 	 * @access public
 	 */
-	public function _readInt1($fh)
+	private static function _readInt1($fh)
 	{
 		list(, $tmp) = unpack("c", fread($fh, 1));
 		return $tmp;
@@ -237,7 +237,7 @@ class PHPExcel_Shared_OLE
 	 * @return  int
 	 * @access public
 	 */
-	public function _readInt2($fh)
+	private static function _readInt2($fh)
 	{
 		list(, $tmp) = unpack("v", fread($fh, 2));
 		return $tmp;
@@ -249,7 +249,7 @@ class PHPExcel_Shared_OLE
 	 * @return  int
 	 * @access public
 	 */
-	public function _readInt4($fh)
+	private static function _readInt4($fh)
 	{
 		list(, $tmp) = unpack("V", fread($fh, 4));
 		return $tmp;
@@ -269,11 +269,11 @@ class PHPExcel_Shared_OLE
 		for ($pos = 0; ; $pos += 128) {
 			fseek($fh, $pos, SEEK_SET);
 			$nameUtf16 = fread($fh, 64);
-			$nameLength = $this->_readInt2($fh);
+			$nameLength = self::_readInt2($fh);
 			$nameUtf16 = substr($nameUtf16, 0, $nameLength - 2);
 			// Simple conversion from UTF-16LE to ISO-8859-1
 			$name = str_replace("\x00", "", $nameUtf16);
-			$type = $this->_readInt1($fh);
+			$type = self::_readInt1($fh);
 			switch ($type) {
 			case self::OLE_PPS_TYPE_ROOT:
 				$pps = new PHPExcel_Shared_OLE_PPS_Root(null, null, array());
@@ -292,14 +292,14 @@ class PHPExcel_Shared_OLE
 			fseek($fh, 1, SEEK_CUR);
 			$pps->Type    = $type;
 			$pps->Name    = $name;
-			$pps->PrevPps = $this->_readInt4($fh);
-			$pps->NextPps = $this->_readInt4($fh);
-			$pps->DirPps  = $this->_readInt4($fh);
+			$pps->PrevPps = self::_readInt4($fh);
+			$pps->NextPps = self::_readInt4($fh);
+			$pps->DirPps  = self::_readInt4($fh);
 			fseek($fh, 20, SEEK_CUR);
 			$pps->Time1st = self::OLE2LocalDate(fread($fh, 8));
 			$pps->Time2nd = self::OLE2LocalDate(fread($fh, 8));
-			$pps->_StartBlock = $this->_readInt4($fh);
-			$pps->Size = $this->_readInt4($fh);
+			$pps->_StartBlock = self::_readInt4($fh);
+			$pps->Size = self::_readInt4($fh);
 			$pps->No = count($this->_list);
 			$this->_list[] = $pps;
 
diff --git a/Classes/PHPExcel/Shared/OLE/PPS.php b/Classes/PHPExcel/Shared/OLE/PPS.php
index aa1a426..e3d4673 100644
--- a/Classes/PHPExcel/Shared/OLE/PPS.php
+++ b/Classes/PHPExcel/Shared/OLE/PPS.php
@@ -169,10 +169,8 @@ class PHPExcel_Shared_OLE_PPS
 	*/
 	public function _getPpsWk()
 	{
-		$ret = $this->Name;
-		for ($i = 0; $i < (64 - strlen($this->Name)); ++$i) {
-			$ret .= "\x00";
-		}
+		$ret = str_pad($this->Name,64,"\x00");
+
 		$ret .= pack("v", strlen($this->Name) + 2)  // 66
 			  . pack("c", $this->Type)              // 67
 			  . pack("c", 0x00) //UK                // 68
@@ -215,4 +213,4 @@ class PHPExcel_Shared_OLE_PPS
 		}
 		return $this->No;
 	}
-	}
+}
diff --git a/Classes/PHPExcel/Shared/OLE/PPS/Root.php b/Classes/PHPExcel/Shared/OLE/PPS/Root.php
index 412f992..a3c4ab6 100644
--- a/Classes/PHPExcel/Shared/OLE/PPS/Root.php
+++ b/Classes/PHPExcel/Shared/OLE/PPS/Root.php
@@ -63,9 +63,9 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 	{
 		// Initial Setting for saving
 		$this->_BIG_BLOCK_SIZE  = pow(2,
-					  ((isset($this->_BIG_BLOCK_SIZE))? $this->_adjust2($this->_BIG_BLOCK_SIZE)  : 9));
+					  ((isset($this->_BIG_BLOCK_SIZE))? self::_adjust2($this->_BIG_BLOCK_SIZE)  : 9));
 		$this->_SMALL_BLOCK_SIZE= pow(2,
-					  ((isset($this->_SMALL_BLOCK_SIZE))?  $this->_adjust2($this->_SMALL_BLOCK_SIZE): 6));
+					  ((isset($this->_SMALL_BLOCK_SIZE))?  self::_adjust2($this->_SMALL_BLOCK_SIZE): 6));
 
 		if (is_resource($filename)) {
 		    $this->_FILEH_ = $filename;
@@ -119,7 +119,8 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 		list($iSBDcnt, $iBBcnt, $iPPScnt) = array(0,0,0);
 		$iSmallLen = 0;
 		$iSBcnt = 0;
-		for ($i = 0; $i < count($raList); ++$i) {
+		$iCount = count($raList);
+		for ($i = 0; $i < $iCount; ++$i) {
 			if ($raList[$i]->Type == PHPExcel_Shared_OLE::OLE_PPS_TYPE_FILE) {
 				$raList[$i]->Size = $raList[$i]->_DataLen();
 				if ($raList[$i]->Size < PHPExcel_Shared_OLE::OLE_DATA_SIZE_SMALL) {
@@ -151,7 +152,7 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 	* @see save()
 	* @return integer
 	*/
-	public function _adjust2($i2)
+	private static function _adjust2($i2)
 	{
 		$iWk = log($i2)/log(2);
 		return ($iWk > floor($iWk))? floor($iWk)+1:$iWk;
@@ -229,7 +230,8 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 			fwrite($FILE, pack("V", $iAll+$i));
 		}
 		if ($i < $i1stBdL) {
-			for ($j = 0; $j < ($i1stBdL-$i); ++$j) {
+			$jB = $i1stBdL - $i;
+			for ($j = 0; $j < $jB; ++$j) {
 				fwrite($FILE, (pack("V", -1)));
 			}
 		}
@@ -247,7 +249,8 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 		$FILE = $this->_FILEH_;
 
 		// cycle through PPS's
-		for ($i = 0; $i < count($raList); ++$i) {
+		$iCount = count($raList);
+		for ($i = 0; $i < $iCount; ++$i) {
 			if ($raList[$i]->Type != PHPExcel_Shared_OLE::OLE_PPS_TYPE_DIR) {
 				$raList[$i]->Size = $raList[$i]->_DataLen();
 				if (($raList[$i]->Size >= PHPExcel_Shared_OLE::OLE_DATA_SIZE_SMALL) ||
@@ -266,9 +269,7 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 					//}
 
 					if ($raList[$i]->Size % $this->_BIG_BLOCK_SIZE) {
-						for ($j = 0; $j < ($this->_BIG_BLOCK_SIZE - ($raList[$i]->Size % $this->_BIG_BLOCK_SIZE)); ++$j) {
-							fwrite($FILE, "\x00");
-						}
+						fwrite($FILE, str_repeat("\x00", $this->_BIG_BLOCK_SIZE - ($raList[$i]->Size % $this->_BIG_BLOCK_SIZE)));
 					}
 					// Set For PPS
 					$raList[$i]->_StartBlock = $iStBlk;
@@ -298,7 +299,8 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 		$FILE = $this->_FILEH_;
 		$iSmBlk = 0;
 
-		for ($i = 0; $i < count($raList); ++$i) {
+		$iCount = count($raList);
+		for ($i = 0; $i < $iCount; ++$i) {
 			// Make SBD, small data string
 			if ($raList[$i]->Type == PHPExcel_Shared_OLE::OLE_PPS_TYPE_FILE) {
 				if ($raList[$i]->Size <= 0) {
@@ -308,7 +310,8 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 					$iSmbCnt = floor($raList[$i]->Size / $this->_SMALL_BLOCK_SIZE)
 								  + (($raList[$i]->Size % $this->_SMALL_BLOCK_SIZE)? 1: 0);
 					// Add to SBD
-					for ($j = 0; $j < ($iSmbCnt-1); ++$j) {
+					$jB = $iSmbCnt - 1;
+					for ($j = 0; $j < $jB; ++$j) {
 						fwrite($FILE, pack("V", $j+$iSmBlk+1));
 					}
 					fwrite($FILE, pack("V", -2));
@@ -323,9 +326,7 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 						$sRes .= $raList[$i]->_data;
 					//}
 					if ($raList[$i]->Size % $this->_SMALL_BLOCK_SIZE) {
-						for ($j = 0; $j < ($this->_SMALL_BLOCK_SIZE - ($raList[$i]->Size % $this->_SMALL_BLOCK_SIZE)); ++$j) {
-							$sRes .= "\x00";
-						}
+						$sRes .= str_repeat("\x00",$this->_SMALL_BLOCK_SIZE - ($raList[$i]->Size % $this->_SMALL_BLOCK_SIZE));
 					}
 					// Set for PPS
 					$raList[$i]->_StartBlock = $iSmBlk;
@@ -335,7 +336,8 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 		}
 		$iSbCnt = floor($this->_BIG_BLOCK_SIZE / PHPExcel_Shared_OLE::OLE_LONG_INT_SIZE);
 		if ($iSmBlk % $iSbCnt) {
-			for ($i = 0; $i < ($iSbCnt - ($iSmBlk % $iSbCnt)); ++$i) {
+			$iB = $iSbCnt - ($iSmBlk % $iSbCnt);
+			for ($i = 0; $i < $iB; ++$i) {
 				fwrite($FILE, pack("V", -1));
 			}
 		}
@@ -351,16 +353,15 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 	public function _savePps(&$raList)
 	{
 		// Save each PPS WK
-		for ($i = 0; $i < count($raList); ++$i) {
+		$iC = count($raList);
+		for ($i = 0; $i < $iC; ++$i) {
 			fwrite($this->_FILEH_, $raList[$i]->_getPpsWk());
 		}
 		// Adjust for Block
 		$iCnt = count($raList);
 		$iBCnt = $this->_BIG_BLOCK_SIZE / PHPExcel_Shared_OLE::OLE_PPS_SIZE;
 		if ($iCnt % $iBCnt) {
-			for ($i = 0; $i < (($iBCnt - ($iCnt % $iBCnt)) * PHPExcel_Shared_OLE::OLE_PPS_SIZE); ++$i) {
-				fwrite($this->_FILEH_, "\x00");
-			}
+			fwrite($this->_FILEH_, str_repeat("\x00",($iBCnt - ($iCnt % $iBCnt)) * PHPExcel_Shared_OLE::OLE_PPS_SIZE));
 		}
 	}
 
@@ -426,7 +427,8 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 		}
 		// Adjust for Block
 		if (($iAllW + $iBdCnt) % $iBbCnt) {
-			for ($i = 0; $i < ($iBbCnt - (($iAllW + $iBdCnt) % $iBbCnt)); ++$i) {
+			$iBlock = ($iBbCnt - (($iAllW + $iBdCnt) % $iBbCnt));
+			for ($i = 0; $i < $iBlock; ++$i) {
 				fwrite($FILE, pack("V", -1));
 			}
 		}
@@ -443,11 +445,12 @@ class PHPExcel_Shared_OLE_PPS_Root extends PHPExcel_Shared_OLE_PPS
 				fwrite($FILE, pack("V", $iBsize+$iSbdSize+$iPpsCnt+$i));
 			}
 			if (($iBdCnt-$i1stBdL) % ($iBbCnt-1)) {
-				for ($i = 0; $i < (($iBbCnt - 1) - (($iBdCnt - $i1stBdL) % ($iBbCnt - 1))); ++$i) {
+				$iB = ($iBbCnt - 1) - (($iBdCnt - $i1stBdL) % ($iBbCnt - 1));
+				for ($i = 0; $i < $iB; ++$i) {
 					fwrite($FILE, pack("V", -1));
 				}
 			}
 			fwrite($FILE, pack("V", -2));
 		}
 	}
-	}
+}
diff --git a/Classes/PHPExcel/Shared/OLERead.php b/Classes/PHPExcel/Shared/OLERead.php
index 5c2aa75..1ef746f 100644
--- a/Classes/PHPExcel/Shared/OLERead.php
+++ b/Classes/PHPExcel/Shared/OLERead.php
@@ -81,19 +81,19 @@ class PHPExcel_Shared_OLERead {
 		}
 
 		// Total number of sectors used for the SAT
-		$this->numBigBlockDepotBlocks = $this->_GetInt4d($this->data, self::NUM_BIG_BLOCK_DEPOT_BLOCKS_POS);
+		$this->numBigBlockDepotBlocks = self::_GetInt4d($this->data, self::NUM_BIG_BLOCK_DEPOT_BLOCKS_POS);
 
 		// SecID of the first sector of the directory stream
-		$this->rootStartBlock = $this->_GetInt4d($this->data, self::ROOT_START_BLOCK_POS);
+		$this->rootStartBlock = self::_GetInt4d($this->data, self::ROOT_START_BLOCK_POS);
 
 		// SecID of the first sector of the SSAT (or -2 if not extant)
-		$this->sbdStartBlock = $this->_GetInt4d($this->data, self::SMALL_BLOCK_DEPOT_BLOCK_POS);
+		$this->sbdStartBlock = self::_GetInt4d($this->data, self::SMALL_BLOCK_DEPOT_BLOCK_POS);
 
 		// SecID of the first sector of the MSAT (or -2 if no additional sectors are used)
-		$this->extensionBlock = $this->_GetInt4d($this->data, self::EXTENSION_BLOCK_POS);
+		$this->extensionBlock = self::_GetInt4d($this->data, self::EXTENSION_BLOCK_POS);
 
 		// Total number of sectors used by MSAT
-		$this->numExtensionBlocks = $this->_GetInt4d($this->data, self::NUM_EXTENSION_BLOCK_POS);
+		$this->numExtensionBlocks = self::_GetInt4d($this->data, self::NUM_EXTENSION_BLOCK_POS);
 
 		$bigBlockDepotBlocks = array();
 		$pos = self::BIG_BLOCK_DEPOT_BLOCKS_POS;
@@ -105,7 +105,7 @@ class PHPExcel_Shared_OLERead {
 		}
 
 		for ($i = 0; $i < $bbdBlocks; ++$i) {
-			  $bigBlockDepotBlocks[$i] = $this->_GetInt4d($this->data, $pos);
+			  $bigBlockDepotBlocks[$i] = self::_GetInt4d($this->data, $pos);
 			  $pos += 4;
 		}
 
@@ -114,13 +114,13 @@ class PHPExcel_Shared_OLERead {
 			$blocksToRead = min($this->numBigBlockDepotBlocks - $bbdBlocks, self::BIG_BLOCK_SIZE / 4 - 1);
 
 			for ($i = $bbdBlocks; $i < $bbdBlocks + $blocksToRead; ++$i) {
-				$bigBlockDepotBlocks[$i] = $this->_GetInt4d($this->data, $pos);
+				$bigBlockDepotBlocks[$i] = self::_GetInt4d($this->data, $pos);
 				$pos += 4;
 			}
 
 			$bbdBlocks += $blocksToRead;
 			if ($bbdBlocks < $this->numBigBlockDepotBlocks) {
-				$this->extensionBlock = $this->_GetInt4d($this->data, $pos);
+				$this->extensionBlock = self::_GetInt4d($this->data, $pos);
 			}
 		}
 
@@ -128,11 +128,12 @@ class PHPExcel_Shared_OLERead {
 		$index = 0;
 		$this->bigBlockChain = array();
 
+		$bbs = self::BIG_BLOCK_SIZE / 4;
 		for ($i = 0; $i < $this->numBigBlockDepotBlocks; ++$i) {
 			$pos = ($bigBlockDepotBlocks[$i] + 1) * self::BIG_BLOCK_SIZE;
 
-			for ($j = 0 ; $j < self::BIG_BLOCK_SIZE / 4; ++$j) {
-				$this->bigBlockChain[$index] = $this->_GetInt4d($this->data, $pos);
+			for ($j = 0 ; $j < $bbs; ++$j) {
+				$this->bigBlockChain[$index] = self::_GetInt4d($this->data, $pos);
 				$pos += 4 ;
 				++$index;
 			}
@@ -146,8 +147,8 @@ class PHPExcel_Shared_OLERead {
 		while ($sbdBlock != -2) {
 			$pos = ($sbdBlock + 1) * self::BIG_BLOCK_SIZE;
 
-			for ($j = 0; $j < self::BIG_BLOCK_SIZE / 4; ++$j) {
-				$this->smallBlockChain[$index] = $this->_GetInt4d($this->data, $pos);
+			for ($j = 0; $j < $bbs; ++$j) {
+				$this->smallBlockChain[$index] = self::_GetInt4d($this->data, $pos);
 				$pos += 4;
 				++$index;
 			}
@@ -187,7 +188,6 @@ class PHPExcel_Shared_OLERead {
 
 			return $streamData;
 
-
 		} else {
 			$numBlocks = $this->props[$this->wrkbook]['size'] / self::BIG_BLOCK_SIZE;
 			if ($this->props[$this->wrkbook]['size'] % self::BIG_BLOCK_SIZE != 0) {
@@ -196,7 +196,6 @@ class PHPExcel_Shared_OLERead {
 
 			if ($numBlocks == 0) return '';
 
-
 			$streamData = '';
 			$block = $this->props[$this->wrkbook]['startBlock'];
 
@@ -239,7 +238,6 @@ class PHPExcel_Shared_OLERead {
 
 			return $streamData;
 
-
 		} else {
 			$numBlocks = $this->props[$this->summaryInformation]['size'] / self::BIG_BLOCK_SIZE;
 			if ($this->props[$this->summaryInformation]['size'] % self::BIG_BLOCK_SIZE != 0) {
@@ -248,7 +246,6 @@ class PHPExcel_Shared_OLERead {
 
 			if ($numBlocks == 0) return '';
 
-
 			$streamData = '';
 			$block = $this->props[$this->summaryInformation]['startBlock'];
 
@@ -291,7 +288,6 @@ class PHPExcel_Shared_OLERead {
 
 			return $streamData;
 
-
 		} else {
 			$numBlocks = $this->props[$this->documentSummaryInformation]['size'] / self::BIG_BLOCK_SIZE;
 			if ($this->props[$this->documentSummaryInformation]['size'] % self::BIG_BLOCK_SIZE != 0) {
@@ -300,7 +296,6 @@ class PHPExcel_Shared_OLERead {
 
 			if ($numBlocks == 0) return '';
 
-
 			$streamData = '';
 			$block = $this->props[$this->documentSummaryInformation]['startBlock'];
 
@@ -330,7 +325,7 @@ class PHPExcel_Shared_OLERead {
 
 		while ($block != -2)  {
 			$pos = ($block + 1) * self::BIG_BLOCK_SIZE;
-			$data = $data . substr($this->data, $pos, self::BIG_BLOCK_SIZE);
+			$data .= substr($this->data, $pos, self::BIG_BLOCK_SIZE);
 			$block = $this->bigBlockChain[$block];
 		}
 		return $data;
@@ -356,16 +351,11 @@ class PHPExcel_Shared_OLERead {
 
 			// sectorID of first sector or short sector, if this entry refers to a stream (the case with workbook)
 			// sectorID of first sector of the short-stream container stream, if this entry is root entry
-			$startBlock = $this->_GetInt4d($d, self::START_BLOCK_POS);
+			$startBlock = self::_GetInt4d($d, self::START_BLOCK_POS);
 
-			$size = $this->_GetInt4d($d, self::SIZE_POS);
+			$size = self::_GetInt4d($d, self::SIZE_POS);
 
-			$name = '';
-			for ($i = 0; $i < $nameSize ; ++$i) {
-				$name .= $d[$i];
-			}
-
-			$name = str_replace("\x00", "", $name);
+			$name = str_replace("\x00", "", substr($d,0,$nameSize));
 
 			$this->props[] = array (
 				'name' => $name,
@@ -407,14 +397,19 @@ class PHPExcel_Shared_OLERead {
 	 * @param int $pos
 	 * @return int
 	 */
-	private function _GetInt4d($data, $pos)
+	private static function _GetInt4d($data, $pos)
 	{
+		// FIX: represent numbers correctly on 64-bit system
+		// http://sourceforge.net/tracker/index.php?func=detail&aid=1487372&group_id=99160&atid=623334
 		// Hacked by Andreas Rehm 2006 to ensure correct result of the <<24 block on 32 and 64bit systems
-		$_or_24 = ord($data[$pos+3]);
-		if ($_or_24>=128) $_ord_24 = -abs((256-$_or_24) << 24);
-		else $_ord_24 = ($_or_24&127) << 24;
-
-		return ord($data[$pos]) | (ord($data[$pos+1]) << 8) | (ord($data[$pos+2]) << 16) | $_ord_24;
+		$_or_24 = ord($data[$pos + 3]);
+		if ($_or_24 >= 128) {
+			// negative number
+			$_ord_24 = -abs((256 - $_or_24) << 24);
+		} else {
+			$_ord_24 = ($_or_24 & 127) << 24;
+		}
+		return ord($data[$pos]) | (ord($data[$pos + 1]) << 8) | (ord($data[$pos + 2]) << 16) | $_ord_24;
 	}
 
 }
diff --git a/changelog.txt b/changelog.txt
index e98b65b..7102e96 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -58,6 +58,7 @@ Fixed in SVN:
 - Bugfix:   (MBaker) Work item 14679 - Formula evaluation fails with Japanese sheet refs
 - Bugfix:   (MBaker) Work item 13559 - PHPExcel_Writer_PDF does not handle cell borders correctly
 - Bugfix:   (MBaker) Work item 14831 - Style : applyFromArray() for 'allborders' not working
+- Bugfix:   (MBaker) Work item 14837 - Using $this when not in object context in Excel5 Reader
 - General:  (MBaker) Applied patch 6609 - Removes a unnecessary loop through each cell when applying conditional formatting to a range.
 - General:  (MBaker) Applied patch 7169 - Removed spurious PHP end tags (?>)
 - General:  (MBaker) Improved performance (speed) and reduced memory overheads, particularly for the Writers, but across the whole library.