Ok, with Windows I've crashed a lot of programs. I don't know what I've done, but they just crash on me. Well, on my PB I have Jaguar. I was working on something, saved it, put my computer to sleep, woke it up an hour later, started clicking on a few programs and crashed OS X. It said something like: With Windows PC's I crash programs faster than I can install them. OS X, I've crashed a few programs but thats because they won't open certain files (emulators opening ROMs for example, then again I ported them from XP to OS X). So, yeah, I've crashed the most stable OS. Only happened once, but it happened.