In particular, GraphicsContext::fillPath() in GraphicsContextQt.cpp needs to handle the special case when scaling was used. The correct behavior is ensured in ContextShadow already, the issue only happens when using a non-blur shadow.
Created attachment 75092 [details] Patch
Comment on attachment 75092 [details] Patch Clearing flags on attachment: 75092 Committed r72898: <http://trac.webkit.org/changeset/72898>
All reviewed patches have been landed. Closing bug.