http://bugs.winehq.org/show_bug.cgi?id=21610
--- Comment #15 from David Philippi david@torangan.de 2010-04-30 12:46:50 --- I can confirm that the patch in bug #22306 fixes the problem for Dungeons & Dragons Online. No graphical glitches anymore.
(http://bugs.winehq.org/attachment.cgi?id=27357)