I just installed the latest iMove, iPhoto and security updates via software update. After the reboot (first one in about a week), Mail won't launch. The black arrow appears underneath it in the dock, but it's not responding. I've left it alone for about 45 minutes before force quitting and trying again to no avail. Then I noticed the same with Safari and Activity Monitor. Then I went to verify and repair permissions with Disk Utility (don't know WHY I didn't do that before the software update...) and my drives show up but when I click on them it locks up and doesn't respond. Other aspects of the computer seem to be working fine. Any suggestions would be greatly appreciated. Thanks!