http://bugs.winehq.org/show_bug.cgi?id=34239
--- Comment #14 from Julius Schwartzenberg julius.schwartzenberg@gmail.com --- If you disable shaders through the registry (and use recent Nvidia drivers), the glitches should be gone actually.
See here http://wiki.winehq.org/UsefulRegistryKeys for the registry keys. You need to use one of the MaxShaderModel?? keys if I remember it correctly.