--- old/modules/graphics/src/main/java/com/sun/javafx/sg/prism/NGNode.java	2014-01-03 16:07:25.440892881 +0100
+++ new/modules/graphics/src/main/java/com/sun/javafx/sg/prism/NGNode.java	2014-01-03 16:07:25.296892877 +0100
@@ -1281,10 +1281,19 @@
             // the group exceeds the bounds of the clip on the group. Just trust me.
             region = region.deriveWithNewBounds(transformedBounds);
         }
-
+        
         // We shouldn't do anything with empty region, as we may accidentally make
         // it non empty or turn it into some nonsense (like (-1,-1,0,0) )
         if (!region.isEmpty()) {
+            // In case we have a valid cache, there might be sub-pixel differences between the computed
+            // transformedBounds (and consequently also dirtyBounds) and the bounds of the cache.
+            // At this point, we still don't know for sure if the cache fill be used (or if it will be recomputed).
+            // For finding that out and then for computing the new cache bounds, we'd need to analyze the current tx
+            // (using "unmatrix" of CacheFilter). Since the gain of tight bounds would be probably very low and so not
+            // worth an extra computation, we just round out the region right here.
+            if (cacheFilter != null && !tx.isTranslateOrIdentity()) {
+                region.roundOut();
+            }
             // Now that we have the dirty region, we will simply apply the tx
             // to it (after slightly padding it for good luck) to get the scene
             // coordinates for this.