The copy ctor of StyleRareNonInheritedData fails to copy m_maskBoxImage, and the operator== fails to compare the m_maskBoxImage.
Created attachment 22244 [details] Patch
Comment on attachment 22244 [details] Patch r=me
Created attachment 22250 [details] Patch with changelog Bring hyatt's review forward.
Committing to http://svn.webkit.org/repository/webkit/trunk ... M WebCore/ChangeLog M WebCore/rendering/style/RenderStyle.cpp Committed r35139