Has anyone seen a problem like mine before? I'm not getting kernal panics, and no applications are actually crashing, but it's a weird behavior that always ends in a forced shutdown. Due to (totally unrelated, I assure you) circumstances I have a very fresh format and install of Tiger and everything is up to date. I had iTunes, Safari, Mail, Adium, LaunchBar, iMote, and iScrobbler open. Those first 5 are things that I always have open all the time and have been using them for years and years with no problems. I've only started using iMote and iScrobbler more recently (9 months?) and since they're both MenuExtra hacks, I suspect one of them might be at fault. I was browsing the MR forums when my internet went out (again totally unrelated issue I've been having with Comcast for a few months). Well, I wanted to disconnect Adium so that i could tell it to reconnect when the internet came back. But it wasn't responding. Force Quit didn't work. Next thing I know I can't quit Mail, and I can't open any new applications like Activity Monitor or Terminal. iMote and iScrobbler have stopped responding as well (and the iScrobbler menu is open with a spinning beachball after I tried to quit it). iTunes, LaunchBar, and the Finder still work flawlessly. Safari successfully quit. I try to restart, but it just goes to a blank desktop and sits there, presumably because one of the frozen processes can't quit (shouldn't OS X be good enough to kill it after a period of time?). I know this as the screen is blank except for that darn iScrobbler menu floating all by itself. So my only option is to force shutdown. I've had exactly the same thing happen a few times now (mostly before my recent format — and no that's not why I formatted) and I can't say for sure if it's always been after a loss of internet and with iScrobbler open. I'm going to run without iScrobbler for a while at least. It should be noted that I have had the same conditions appear also with no problems whatsoever. It seems to me that something caused an important system process to lockup or crash, though I don't know what one that might be.