Here's a fun one! Not sure if it's reproducable on console or not.
Mac OS X, currently 2.3.0 on this computer (maybe it's been fixed?)
If you have an unfinished command on the command line, trying to quit (Apple+Q), and then hitting okay errors with Confirm_Command: Invalid syntax or similar. Clearing the command line works fine. I'll try 2.3.3 tomorrow and see what happens.
