I'm a new mac user, having switched from windows about two months ago. I've noticed that in Tiger, my apps freeze up a lot more than they did in windows. And when they do, it seems these days that a force quit can't resolve the issue. Once one program is locked up, it's just a matter of time (and a short one at that) before the rest of my programs lock up, and eventually the system. I'm having to force-reboot my mac (a SP Powermac G5 circa May 2005) something like 5-6 times a day. This is in addition to my box frequently being unable to come out of sleep and/or screensaver properly. Is this -normal-? When I got my mac in the mail, it came installed with Panther and a Tiger upgrade dvd, so I assumed I had to do an upgrade or archive install, when I would have preferred to have just done a wipe and reinstall. Could this be affecting my system performance? Is it maybe my 512 mb of ram? I'm just amazed that this could be happening in a 64 bit system, when all I'm running are apps like firefox, adium, ical and textedit. And occasionally Office 2004.