http://bugs.winehq.org/show_bug.cgi?id=21725
--- Comment #13 from Roderick Colenbrander thunderbird2k@gmail.com 2010-04-13 11:16:28 --- You could try the following patch I submitted. Not sure when it will enter GIT (it might need a few more iterations). Not saying it will help but it could help. http://www.winehq.org/pipermail/wine-patches/2010-April/087139.html
Roderick