The only things that aren’t allowed are piracy related matters including everything that circumvents any kind of DRM. Unless your fix doesn’t circumvents/bypasses a game’s (or 3D Vision’s) DRM, you can freely post it, of course.
Rule of thumb: since 3D-Vision is restricted to certified hardware, which is how nVidia makes money with it, everything that circumvents this hardware restriction is to be considered a DRM bypass that (for hopefully understandable reasons) cannot be discussed here.