my computer crashed yesterday, and when i reboot, it took forever to restart, then crashed a couple more times. i tried a disk repair from the install CD disk utilities, but after an hour or so, it said disk coudln't repair (i think it repaired things like the B-tree and directories) now it takes 10mins+ to boot, and apps that used to launch right away, take a long time. there's a lag as i type this in now. it's a dual 2ghz PowerPC G5, 3gigs of ram, running on tiger 10.4.11. anyone have any similar problems? any ideas? would upgrading to leopard help?