My current game works flawlessly in unity. The standalone x86_x64 compiles but each time a raycast is to happen it crashes. The standalone x86 works flawlessly.
In how far does that help me figuring out the cause?
Because recently the x64 build of the same game worked…
If you are using Unity 4.1.5 or earlier, try to upgrade to Unity 4.2 or later.
Unity 4.2 “What’s new”:
Physics: Fixed a crash in raycasts against BoxColliders on 64 bit Windows.
If you still have the problem with 4.2, consider trying the latest version of Unity. If the crash still occur, please try to make a minimal reproducible and submit a bug report.