iMessage Freezes/Hangs when sending screen shots Worked fine sending 114k file of .png screen-shot; a 254k file freezes it dead.

So bad that I couldn't open up a tab in Safari. I suspect Evil Forces, but would be amused to learn it's a known issue.

Tested further just now sending 169k jpg file: hung so badly that again couldn't type here in Safari. Like it's sucking up all the good electrons and puppies.

Kernel panic? And why?
I had similar problem just recently. Here is what I did.

follow this to fix the problem

~/Library/Preferences

delete com.apple.ichat.plist