I popped in a DVD into my powerbook for the first time today and it asked me if I wanted to set the region to play that DVD. So I was like, "ok", but then it said that you can only change the region 5 times, ever! What's up with this? Why can't you just switch the region whenever you want to watch a DVD from a different region? And I guess this would be a more important question, is the region switching limit based on the hardware or the os?