http://bugs.winehq.org/show_bug.cgi?id=8938
--- Comment #11 from Kusanagi Kouichi slash@ac.auone-net.jp 2010-02-12 10:34:24 --- Created an attachment (id=26230) --> (http://bugs.winehq.org/attachment.cgi?id=26230) Don't destroy hCompStr when composition finished.
I confirmed this bug. Attached patch should fix it.