1st Gen 24" Aluminum iMac running OSX Leopard 10.5 I've been getting random freezes for several months now, but only yesterday following a freeze, I was met by a folder icon with a flashing question mark on startup. I tried booting to my Windows partition, but no luck. This morning I turned it on and it started up just fine! I began copying files to my external hard drive, and within minutes, it froze again. I booted up to the Leopard install disc to use the Disc Utility, but repeated attempts at Verify/Repair failed. I immediately restarted holding Option to view available discs...and both my OSX and XP partitions showed up. As soon as I tried clicking on Macintosh HD, the icon went "poof", just like an icon being removed from the Dock. Same thing happened with the Windows icon. Does it sound like my hard drive is going bad? I'm also willing to re-install Leopard if it might help. Any ideas?