Well, how would know that you are not running the Windows version. Your sig doesn't show what kind of computer you are using and you didn't mention it either. I've tried the Windows version and it crashed more than once. I have it installed on my Macbook Air and iMac using Leopard and I have no issues whatsoever. Should we expect it to work well on both platforms? Perhaps, but remember the Macintosh is an Apple product and anything Apple makes is likely to be better on the Mac.
Microsoft does the same thing, anything they make for Mac sucks compared to the Windows version.