diff -r 433cbbb6a04b -r 10534483575f uiacceltk/hitchcock/coretoolkit/src/HuiFxEffect.cpp
--- a/uiacceltk/hitchcock/coretoolkit/src/HuiFxEffect.cpp	Fri Mar 12 15:47:04 2010 +0200
+++ b/uiacceltk/hitchcock/coretoolkit/src/HuiFxEffect.cpp	Mon Mar 15 12:43:37 2010 +0200
@@ -272,6 +272,10 @@
         
         // Check if cache is up-to date or does it need to be refreshed
         TBool cachedRenderTargetNeedsRefresh = (iRoot->Changed() || aRefreshCachedRenderTarget || (enableBackground && !useFrozenBackground));
+        if (!iCachedRenderTarget || (iCachedRenderTarget && iCachedRenderTarget->Size() !=  iRoot->VisualRect().Size())) 
+            {
+            cachedRenderTargetNeedsRefresh = ETrue;
+            }
 
         // Try to apply also margins, we cannot just use aDisplayRect directly
         TRect targetRect = iRoot->VisualRect();