diff --git a/gfx/public/nsRect.h b/gfx/public/nsRect.h
index 281383ed03c..7f5c894b9ad 100644
--- a/gfx/public/nsRect.h
+++ b/gfx/public/nsRect.h
@@ -159,8 +159,15 @@ struct NS_GFX nsRect {
                                           height = NSToCoordRound(height * aScale); 
                                           return *this;}
 
-  nsRect& ScaleRoundOut(const float aScale);
-  nsRect& ScaleRoundIn(const float aScale);
+  // Scale by aScale, converting coordinates to integers so that the result
+  // is the smallest integer-coordinate rectangle containing the unrounded result
+  nsRect& ScaleRoundOut(float aScale);
+  // Scale by aScale, converting coordinates to integers so that the result
+  // is the larges integer-coordinate rectangle contained in the unrounded result
+  nsRect& ScaleRoundIn(float aScale);
+  // Scale by aScale, converting coordinates to integers so that the result
+  // contains the same pixel centers as the unrounded result
+  nsRect& ScaleRoundPreservingCenters(float aScale);
 
   // Helpers for accessing the vertices
   nsPoint TopLeft() const { return nsPoint(x, y); }
diff --git a/gfx/src/nsRect.cpp b/gfx/src/nsRect.cpp
index 7eef03bbe1b..3a85303decc 100644
--- a/gfx/src/nsRect.cpp
+++ b/gfx/src/nsRect.cpp
@@ -181,10 +181,10 @@ void nsRect::Deflate(const nsMargin &aMargin)
 }
 
 // scale the rect but round to smallest containing rect
-nsRect& nsRect::ScaleRoundOut(const float aScale) 
+nsRect& nsRect::ScaleRoundOut(float aScale) 
 {
-  nscoord right = NSToCoordCeil(float(x + width) * aScale);
-  nscoord bottom = NSToCoordCeil(float(y + height) * aScale);
+  nscoord right = NSToCoordCeil(float(XMost()) * aScale);
+  nscoord bottom = NSToCoordCeil(float(YMost()) * aScale);
   x = NSToCoordFloor(float(x) * aScale);
   y = NSToCoordFloor(float(y) * aScale);
   width = (right - x);
@@ -193,10 +193,10 @@ nsRect& nsRect::ScaleRoundOut(const float aScale)
 }
 
 // scale the rect but round to largest contained rect
-nsRect& nsRect::ScaleRoundIn(const float aScale) 
+nsRect& nsRect::ScaleRoundIn(float aScale) 
 {
-  nscoord right = NSToCoordFloor(float(x + width) * aScale);
-  nscoord bottom = NSToCoordFloor(float(y + height) * aScale);
+  nscoord right = NSToCoordFloor(float(XMost()) * aScale);
+  nscoord bottom = NSToCoordFloor(float(YMost()) * aScale);
   x = NSToCoordCeil(float(x) * aScale);
   y = NSToCoordCeil(float(y) * aScale);
   width = (right - x);
@@ -204,6 +204,17 @@ nsRect& nsRect::ScaleRoundIn(const float aScale)
   return *this;
 }
 
+nsRect& nsRect::ScaleRoundPreservingCenters(float aScale)
+{
+  nscoord right = NSToCoordRound(float(XMost()) * aScale);
+  nscoord bottom = NSToCoordRound(float(YMost()) * aScale);
+  x = NSToCoordRound(float(x) * aScale);
+  y = NSToCoordRound(float(y) * aScale);
+  width = (right - x);
+  height = (bottom - y);
+  return *this;
+}
+
 #ifdef DEBUG
 // Diagnostics
 
diff --git a/view/src/nsView.cpp b/view/src/nsView.cpp
index 18ec1ac5a96..e4fe5cb0f21 100644
--- a/view/src/nsView.cpp
+++ b/view/src/nsView.cpp
@@ -386,11 +386,11 @@ void nsView::DoResetWidgetBounds(PRBool aMoveOnly,
     }
   }
 
-  nsRect newBounds(NSAppUnitsToIntPixels((mDimBounds.x + offset.x), p2a),
-                   NSAppUnitsToIntPixels((mDimBounds.y + offset.y), p2a),
-                   NSAppUnitsToIntPixels(mDimBounds.width, p2a),
-                   NSAppUnitsToIntPixels(mDimBounds.height, p2a));
-    
+  nsRect viewBounds(mDimBounds + offset);
+
+  nsRect newBounds(viewBounds);
+  newBounds.ScaleRoundPreservingCenters(1.0f / p2a);
+
   PRBool changedPos = PR_TRUE;
   PRBool changedSize = PR_TRUE;
   if (!(mVFlags & NS_VIEW_FLAG_HAS_POSITIONED_WIDGET)) {
@@ -412,6 +412,10 @@ void nsView::DoResetWidgetBounds(PRBool aMoveOnly,
       mWindow->Resize(newBounds.width, newBounds.height, aInvalidateChangedSize);
     } // else do nothing!
   }
+
+  nsPoint roundedOffset(NSIntPixelsToAppUnits(newBounds.x, p2a),
+                        NSIntPixelsToAppUnits(newBounds.y, p2a));
+  mViewToWidgetOffset = viewBounds.TopLeft() - roundedOffset;
 }
 
 void nsView::SetDimensions(const nsRect& aRect, PRBool aPaint, PRBool aResizeWidget)
@@ -858,7 +862,8 @@ nsIWidget* nsIView::GetNearestWidget(nsPoint* aOffset) const
   // not coincide with v's origin
   if (aOffset) {
     nsRect vBounds = v->GetBounds();
-    *aOffset = pt + v->GetPosition() -  nsPoint(vBounds.x, vBounds.y);
+    *aOffset = pt + v->GetPosition() -  nsPoint(vBounds.x, vBounds.y) -
+               v->ViewToWidgetOffset();
   }
   return v->GetWidget();
 }
diff --git a/view/src/nsView.h b/view/src/nsView.h
index dcc0823df7a..8d90fafa191 100644
--- a/view/src/nsView.h
+++ b/view/src/nsView.h
@@ -218,6 +218,10 @@ public:
 
   virtual ~nsView();
 
+  nsPoint ViewToWidgetOffset() const {
+    return mViewToWidgetOffset;
+  }
+
 protected:
   // Do the actual work of ResetWidgetBounds, unconditionally.  Don't
   // call this method if we have no widget.
@@ -228,6 +232,7 @@ protected:
   // mClipRect is relative to the view's origin.
   nsRect*      mClipRect;
   nsRegion*    mDirtyRegion;
+  nsPoint      mViewToWidgetOffset;
   PRPackedBool mChildRemoved;
 };
 
diff --git a/view/src/nsViewManager.cpp b/view/src/nsViewManager.cpp
index a6d58729c7b..807a52d3415 100644
--- a/view/src/nsViewManager.cpp
+++ b/view/src/nsViewManager.cpp
@@ -483,8 +483,13 @@ void nsViewManager::Refresh(nsView *aView, nsIRenderingContext *aContext,
 
   ctx->Save();
 
-  ctx->Translate(gfxPoint(NSAppUnitsToIntPixels(viewRect.x, p2a),
-                          NSAppUnitsToIntPixels(viewRect.y, p2a)));
+  nsPoint vtowoffset = aView->ViewToWidgetOffset();
+  ctx->Translate(gfxPoint(gfxFloat(vtowoffset.x) / p2a,
+                          gfxFloat(vtowoffset.y) / p2a));
+
+  NS_ASSERTION(!viewRect.x && !viewRect.y, "When exactly is this supposed to be non-zero?");
+  ctx->Translate(gfxPoint(gfxFloat(viewRect.x) / p2a,
+                          gfxFloat(viewRect.y) / p2a));
 
   nsRegion opaqueRegion;
   AddCoveringWidgetsToOpaqueRegion(opaqueRegion, mContext, aView);