http://bugs.winehq.org/show_bug.cgi?id=21962
--- Comment #7 from Stefan Dösinger stefandoesinger@gmx.at 2010-03-12 11:40:17 --- This sounds as if its related to the alignment of the returned pointers - Most pointers the nvidia driver returns are properly aligned, so it will take a while before you hit a non-aligned one.
Can you monitor bug 21941? I'll attach more test patches there, but I don't want to close your bug as a duplicate again just yet.