diff --git a/src/viewer.js b/src/viewer.js
index 2f1684de..2f5f697e 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -608,6 +608,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
                 if (successes) {
                     if (_this._firstOpen || !_this.preserveViewport) {
                         _this.viewport.goHome( true );
+                        _this.viewport.update();
                     }
 
                     _this._firstOpen = false;
diff --git a/src/viewport.js b/src/viewport.js
index 1f07ebbe..167e0eca 100644
--- a/src/viewport.js
+++ b/src/viewport.js
@@ -953,7 +953,10 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
             //they passed a point instead of individual components
             return this.viewportToImageCoordinates( viewerX.x, viewerX.y );
         }
-        return new $.Point( viewerX * this.contentSize.x, viewerY * this.contentSize.y * this.contentAspectX );
+
+        var scale = this.homeBounds.width;
+        return new $.Point((viewerX - this.homeBounds.x) * (this.contentSize.x / scale),
+            (viewerY - this.homeBounds.y) * ((this.contentSize.y * this.contentAspectX) / scale));
     },
 
     /**
@@ -971,7 +974,10 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
             //they passed a point instead of individual components
             return this.imageToViewportCoordinates( imageX.x, imageX.y );
         }
-        return new $.Point( imageX / this.contentSize.x, imageY / this.contentSize.y / this.contentAspectX );
+
+        var scale = this.homeBounds.width;
+        return new $.Point(this.homeBounds.x + ((imageX / this.contentSize.x) * scale),
+            this.homeBounds.y + ((imageY / this.contentSize.y / this.contentAspectX) * scale));
     },
 
     /**
@@ -1003,13 +1009,13 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
             imageX, imageY
         );
         coordB = this.imageToViewportCoordinates(
-            pixelWidth, pixelHeight
+            imageX + pixelWidth, imageY + pixelHeight
         );
         return new $.Rect(
             coordA.x,
             coordA.y,
-            coordB.x,
-            coordB.y
+            coordB.x - coordA.x,
+            coordB.y - coordA.y
         );
     },
 
@@ -1039,12 +1045,12 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
             );
         }
         coordA = this.viewportToImageCoordinates( viewerX, viewerY );
-        coordB = this.viewportToImageCoordinates( pointWidth, pointHeight );
+        coordB = this.viewportToImageCoordinates(viewerX + pointWidth, viewerY + pointHeight);
         return new $.Rect(
             coordA.x,
             coordA.y,
-            coordB.x,
-            coordB.y
+            coordB.x - coordA.x,
+            coordB.y - coordA.y
         );
     },
 
@@ -1148,7 +1154,8 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
     viewportToImageZoom: function( viewportZoom ) {
         var imageWidth = this.viewer.source.dimensions.x;
         var containerWidth = this._containerInnerSize.x;
-        var viewportToImageZoomRatio = containerWidth / imageWidth;
+        var scale = this.homeBounds.width;
+        var viewportToImageZoomRatio = (containerWidth / imageWidth) * scale;
         return viewportZoom * viewportToImageZoomRatio;
     },
 
@@ -1166,7 +1173,8 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
     imageToViewportZoom: function( imageZoom ) {
         var imageWidth = this.viewer.source.dimensions.x;
         var containerWidth = this._containerInnerSize.x;
-        var viewportToImageZoomRatio = imageWidth / containerWidth;
+        var scale = this.homeBounds.width;
+        var viewportToImageZoomRatio = (imageWidth / containerWidth) / scale;
         return imageZoom * viewportToImageZoomRatio;
     }
 };
diff --git a/test/demo/collections/main.js b/test/demo/collections/main.js
index 669d4fdb..b2c7eeb8 100644
--- a/test/demo/collections/main.js
+++ b/test/demo/collections/main.js
@@ -7,7 +7,7 @@
             var self = this;
 
             var testInitialOpen = true;
-            var testOverlays = true;
+            var testOverlays = false;
             var testMargins = false;
             var testNavigator = false;
             var margins;
@@ -34,6 +34,12 @@
 
             if (testInitialOpen) {
                 config.tileSources = [
+                    {
+                        tileSource: "../../data/testpattern.dzi",
+                        x: 4,
+                        y: 2,
+                        width: 2
+                    },
                     {
                         tileSource: "../../data/tall.dzi",
                         x: 1.5,