Title says it all. The new leaks seem to be in RenderSlider, so I think r 21739 is to blame.
Created attachment 14713 [details] Fix the leak and another regression from r21735
Created attachment 14714 [details] Fix the leak and another regression from r21739 Fixed the revision number.
Comment on attachment 14714 [details] Fix the leak and another regression from r21739 r=me
Committed revision 21789.