http://bugs.winehq.org/show_bug.cgi?id=17500
--- Comment #3 from Philip Nilsson leffeman@gmail.com 2009-02-22 18:33:31 --- Created an attachment (id=19616) --> (http://bugs.winehq.org/attachment.cgi?id=19616) testcase
I believe I am affected by this bug, I managed to get down to this testcase (which fails when run with ja_JP.utf8 and succeeds with en_US.utf8), and reverting the patch makes it succeed.