http://bugs.winehq.org/show_bug.cgi?id=22478
--- Comment #24 from Roderick Colenbrander thunderbird2k@gmail.com 2010-05-03 09:56:52 --- Created an attachment (id=27689) --> (http://bugs.winehq.org/attachment.cgi?id=27689) Improved fix
I think this fix is already a bit better. Performance should be similar. I must say that the issue is still hard to reproduce so now and then. Lets say half of the runs are with performance in the 25fps but when performance is good it is around 30-35fps. I have no idea what causes it but I guess the Nvidia drivers haven't clocked the GPU up yet.
I hope to have a new version ready soon (I think the change needs to be moved to context_apply_fbo_entry) but can't promise when since something bad has happened in the family :(