diff -r 5dc02b23752f -r 3e2da88830cd src/gui/effects/qgraphicseffect.cpp
--- a/src/gui/effects/qgraphicseffect.cpp	Tue Jul 06 15:10:48 2010 +0300
+++ b/src/gui/effects/qgraphicseffect.cpp	Wed Aug 18 10:37:55 2010 +0300
@@ -488,13 +488,10 @@
 */
 
 /*!
-    Schedules a redraw of the source. Call this function whenever the source
-    needs to be redrawn.
+    Schedules a redraw of the effect. Call this function whenever the effect
+    needs to be redrawn. This function does not trigger a redraw of the source.
 
-    This convenience function is equivalent to calling
-    QGraphicsEffectSource::update().
-
-    \sa updateBoundingRect(), QGraphicsEffectSource::update()
+    \sa updateBoundingRect()
 */
 void QGraphicsEffect::update()
 {