http://bugs.winehq.org/show_bug.cgi?id=26862
--- Comment #13 from Stefan Dösinger stefandoesinger@gmx.at 2011-05-01 14:49:04 CDT --- That's strange for sure, but it could also be coincidence(e.g. different handling of the exception, or the app randomly passing in a different pixel shader when the call fails). You're welcome to debug this, but I won't spend my time on trying to figure out why a 32 bit and WoW64 setup behave differently.
I can reopen the bug if you want to, but don't expect too much action on it.