iChatAV problem

My iChatAV has developed a problem whereby it quits immediately upon
launch. I have had no issues with it up to today when a friend
initiated a video conference and iChat quit. When I went to relaunch,
it opened the windows and then quit immediatley.

This was about an hour after installing today's Java 1.5.0 update using
Apple's software update.

I have repaired permissions, deleted all the iChat preferences and
removed the iGlasses plug in but nothing works. I created a new user on
my Mac & logged in but iChat still would not launch.

Any suggestions would be greatly appreciated.

iChatAV 3.1, Mac OS X 10.4.3, G5 Dual 2Ghz