i have a problem with OS X. it keeps freezing while i'm working, so then i reboot and the flashing '?' comes up on the screen. and this means that i'm supposed to reinstall the system software, but i can be bothered with that. so i turn my TiBook off for about half an hour, then boot up again and everything is fine. and i just got another 512MB RAM, it's running a bit more smoothly now. i think that the problem is that i've been stuffing around with lots of demo software and freeware (mostly FTP clients). i've deleted most of the ones i don't use anymore, but could they have left extensions or something on my Mac? if the program doesn't come with an unistaller, is there a utility or something that can completely get rid of the app? anyway, it's not so bad now. i'll probably just wait until 10.2 then do a complete reinstall. that'll definitely fix everything, right?