diff --git a/gfx/src/windows/nsRenderingContextWin.cpp b/gfx/src/windows/nsRenderingContextWin.cpp
index b6ba4e75e20b..a2241e82b3ec 100644
--- a/gfx/src/windows/nsRenderingContextWin.cpp
+++ b/gfx/src/windows/nsRenderingContextWin.cpp
@@ -2842,11 +2842,18 @@ NS_IMETHODIMP
 nsRenderingContextWin::DrawTile(nsIImage *aImage,nscoord aX0,nscoord aY0,nscoord aX1,nscoord aY1,
                                                     nscoord aWidth,nscoord aHeight)
 {
-PRBool didtile = FALSE;
+nscoord     orgX,orgY,orgWidth,orgHeight;
+PRBool      didtile = FALSE;
 
   // convert output platform, but no translation.. just scale
+  orgX = aX0;
+  orgY = aY0;
+  orgWidth = aX1 - aX0;
+  orgHeight = aY1 - aY0;
   mTranMatrix->TransformCoord(&aX0,&aY0,&aWidth,&aHeight);
-  mTranMatrix->TransformCoord(&aX1,&aY1);
+  mTranMatrix->TransformCoord(&orgX,&orgY,&orgWidth,&orgHeight);
+  aX1 = aX0 + orgWidth;
+  aY1 = aY0 + orgHeight;
 
   if ( PR_TRUE==CanTile(aWidth,aHeight) ) {    
     didtile = ((nsImageWin*)aImage)->PatBltTile(*this,mSurface,aX0,aY0,aX1,aY1,aWidth,aHeight);
@@ -2884,7 +2891,7 @@ PRInt32 canRaster;
     }
     else {
       // windows NT
-      return PR_TRUE;
+      return PR_FALSE;
     }
   } else {
     return PR_FALSE;