diff -r b72c6db6890b -r 5dc02b23752f src/gui/effects/qgraphicseffect.cpp
--- a/src/gui/effects/qgraphicseffect.cpp	Wed Jun 23 19:07:03 2010 +0300
+++ b/src/gui/effects/qgraphicseffect.cpp	Tue Jul 06 15:10:48 2010 +0300
@@ -326,7 +326,7 @@
     }
 
     QPixmap pm;
-    if (d->m_cachedSystem == system && d->m_cachedMode == mode)
+    if (item && d->m_cachedSystem == system && d->m_cachedMode == mode)
         QPixmapCache::find(d->m_cacheKey, &pm);
 
     if (pm.isNull()) {