some might say running 32 bit apps on 64 bit cpus will have bugs, i from personal experience with 3ds max found that 3ds max runs more stable with my 64 bit core i7, with the parray system on 64 bit i could not use number of chunks without 3ds max force quitting, but on the 32 bit version everything ran more smoothly, even the animation playback which on the 64 bit ran with a bit of lag,