http://bugs.winehq.org/show_bug.cgi?id=25394
--- Comment #8 from Jerome Leclanche adys.wh@gmail.com 2010-12-05 11:31:20 CST --- (In reply to comment #7)
(In reply to comment #5)
CC Mikolaj, as he's the one who worked most on TB_INSERTBUTTON implementation.
If native comctl32 doesn't help that's not related then.
Actually, native comctl32 does help the issue with the "empty" bitmaps. I should file a different bug for it though.