A couple of months ago I noticed my Mac acting strangely so I went through the usual process - permissions, verify, etc. Well when I verified my disk, it reported errors. So I popped in my Snow Leopard DVD and repaired the disk. All seems fine. Fast forward to a few weeks later, same thing, first thing I did was verify disk, and yep, errors. Snow Leopard DVD in, repaired, and all is fine. Just happened again today, and Disk Utility reported errors again. Is my hard drive dying, or is this something else? Do I have to take the iMac into the Apple Store (ugh)?