diff --git a/src/dzitilesource.js b/src/dzitilesource.js
index eb283fab..99dd92d1 100644
--- a/src/dzitilesource.js
+++ b/src/dzitilesource.js
@@ -107,8 +107,10 @@ $.extend( $.DziTileSource.prototype, $.TileSource.prototype, /** @lends OpenSead
         var ns;
         if ( data.Image ) {
             ns = data.Image.xmlns;
-        } else if ( data.documentElement && "Image" == data.documentElement.localName ) {
-            ns = data.documentElement.namespaceURI;
+        } else if ( data.documentElement) {
+            if ("Image" == data.documentElement.localName || "Image" == data.documentElement.tagName) {
+                ns = data.documentElement.namespaceURI;
+            }
         }
 
         return ( "http://schemas.microsoft.com/deepzoom/2008" == ns ||
@@ -221,7 +223,7 @@ function configureFromXML( tileSource, xmlDoc ){
     }
 
     var root           = xmlDoc.documentElement,
-        rootName       = root.localName,
+        rootName       = root.localName || root.tagName,
         ns             = xmlDoc.documentElement.namespaceURI,
         configuration  = null,
         displayRects   = [],
@@ -234,7 +236,10 @@ function configureFromXML( tileSource, xmlDoc ){
     if ( rootName == "Image" ) {
 
         try {
-            sizeNode = root.getElementsByTagNameNS(ns, "Size" )[ 0 ];
+            sizeNode = root.getElementsByTagName("Size" )[ 0 ];
+            if (sizeNode === undefined) {
+                sizeNode = root.getElementsByTagNameNS(ns, "Size" )[ 0 ];
+            }
 
             configuration = {
                 Image: {
@@ -257,11 +262,17 @@ function configureFromXML( tileSource, xmlDoc ){
                 );
             }
 
-            dispRectNodes = root.getElementsByTagNameNS(ns, "DisplayRect" );
+            dispRectNodes = root.getElementsByTagName("DisplayRect" );
+            if (dispRectNodes === undefined) {
+                dispRectNodes = root.getElementsByTagNameNS(ns, "DisplayRect" )[ 0 ];
+            }
 
             for ( i = 0; i < dispRectNodes.length; i++ ) {
                 dispRectNode = dispRectNodes[ i ];
-                rectNode     = dispRectNode.getElementsByTagNameNS(ns, "Rect" )[ 0 ];
+                rectNode     = dispRectNode.getElementsByTagName("Rect" )[ 0 ];
+                if (rectNode === undefined) {
+                    rectNode = dispRectNode.getElementsByTagNameNS(ns, "Rect" )[ 0 ];
+                }
 
                 displayRects.push({
                     Rect: {
diff --git a/src/world.js b/src/world.js
index 79967d5a..4b1c9826 100644
--- a/src/world.js
+++ b/src/world.js
@@ -177,7 +177,7 @@ $.extend( $.World.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.W
     removeItem: function( item ) {
         $.console.assert(item, "[World.removeItem] item is required");
 
-        var index = this._items.indexOf( item );
+        var index = $.indexOf(this._items, item );
         if ( index === -1 ) {
             return;
         }
diff --git a/test/demo/collections/main.js b/test/demo/collections/main.js
index 792f7c12..cc18a064 100644
--- a/test/demo/collections/main.js
+++ b/test/demo/collections/main.js
@@ -9,20 +9,21 @@
             var testInitialOpen = true;
             var testOverlays = false;
             var testMargins = false;
-            var testNavigator = true;
+            var testNavigator = false;
             var margins;
 
             var config = {
                 // debugMode: true,
                 zoomPerScroll: 1.02,
                 showNavigator: testNavigator,
+                useCanvas: true,
                 // sequenceMode: true,
                 // showReferenceStrip: true,
                 // referenceStripScroll: 'vertical',
                 navPrevNextWrap: false,
                 preserveViewport: false,
-                // collectionMode: true,
-                // collectionRows: 3,
+                collectionMode: true,
+                collectionRows: 1,
                 // collectionLayout: 'vertical',
                 // collectionTileSize: 10,
                 // collectionTileMargin: 10,
@@ -97,8 +98,11 @@
             this.viewer = OpenSeadragon(config);
 
             if (testInitialOpen) {
-                this.viewer.addHandler( "open", function() {
-                });
+                function openHandler() {
+                    self.viewer.removeHandler('open', openHandler);
+                }
+
+                this.viewer.addHandler( "open", openHandler);
             }
 
             if (testMargins) {