Hey, having a bit of a problem here. For the second time in a row, when I plugged my Apple Cinema Display's USB cable into my Macbook Pro (2010 15" i7, if it matters), the system hung. Now let me clarify - the whole system didn't hang, but the right side of the menu bar did. By right side, I mean everything to the right (and including) the left most APPLE menu icon. So that's basically Time Machine, Bluetooth, Wifi, Volume, Time/date, my username, and the Spotlight icon. The 3rd party menu icons are fine (caffeine, dropbox, etc). Also, the hard drive attached to my ACD doesn't mount. The same exact thing happened earlier today. I had my computer charging overnight, and as soon as I plugged the USB cable in, the menu bar froze. I tried to delete the SystemUIServer .plist file earlier, I updated to 10.6.8, and I reset the PRAM. Unfortunately, none of that worked because it happened again just now. I then tried killing SystemUIServer; the apple menu bar icons, the 3rd party icons shifted to the right to take their place, and the Apple icons won't come back. I have three devices plugged into my Apple Cinema Display: the external hard drive I use for Time Machine, the receiver for my wireless mouse, and my Wacom tablet. Now that I'm thinking about it, I may have unplugged the hard drive without ejecting recently (i.e., it might have been right before this started to happen). If I restart with the cable plugged in, everything works properly and the drive mounts correctly. Any ideas or input? If at all possible, I'd like to avoid reformatting the external hard drive or doing anything that would cause my Time Machine backups to be wiped out.