Mail.app crashing

[LuKreme]

My mail.app has suddendly started crashing like Ted Kennedy after a long
weekend.

This is in the crash report, but I don't know what it might mean, though
one of you lot might have an idea.

Application Specific Information:
-[IMAPAccount _synchronizeAccountWithServerWithUserInput:]
-[IMAPGateway _allowClientOperationThrough:]
-[IMAPGateway _allowClientOperationThrough:]
-[IMAPAccount _synchronizeAccountWithServerWithUserInput:]
*** Terminating app due to uncaught exception 'NSRangeException', reason:
'*** -[NSMutableIndexSet addIndexesInRange:]: Range {2289994348, 1}
exceeds maximum index value of NSNotFound - 1'


-- 
Living is easy with eyes closed, misunderstanding all you see