20" iMac G5, 2.0 GHz, 512 MB RAM, 128 MB VRAM, 260 GB HD, AE+BT Mac OS X 10.4.5 Firefox crashes a lot, but I am used to it. This time however, was really weird... Mac OS X has been reporting that FF has crashed before it actually has. That's weird, but I just figured that it was in the process of crashing when the Reporter came up. This time, the Reporter came up and FF was still working. I clicked "Reopen" just in case it was like the times before. It wasn't however. Three minutes later, iTunes started skipping, which happens sometimes, and then it stopped playing altogether. My mouse still worked, but the pointer was stuck with FF's "working" pointer. All applications locked up and I couldn't switch to Finder or get anything to Force Quit. After I hard-restarted it, I verified and repaired my disk permissions for the very first time on this machine and everything seems to be running a lot smoother, although iPhoto's music during a slideshow was pretty choppy in places.