http://bugs.winehq.org/show_bug.cgi?id=6547
------- Additional Comments From ek.kato@gmail.com 2006-08-11 02:37 ------- I think this is caused from a bug in Xlib.
See https://bugs.freedesktop.org/show_bug.cgi?id=1182, and the patch in comment #12 (https://bugs.freedesktop.org/attachment.cgi?id=4874) should solve the problem.