In the event you get one of these Unexpected Exception errors again you can try a "Hard Reset" by removing battery and holding down Power button (71XX/8XXX series phones) for 30 sec and replacing battery...if I'm not mistaken the removing of the battery for greater than 15sec on other model blackberries is still considered a "hard reset" someone correct me if I'm wrong.
If that doesn't get rid of the error you can reload the OS on the Blackberry relatively quickly (approx. 15-20min). There are plenty of tutorials on this site for accomplishing that task and it's pretty easy as well.
I was getting an Uncaught Exception error that prohibited me from checking my email the other day and a Hard Reset, battery removal, provisioning, service books resend didn't fix the problem....was only resolved by reloading OS.
Just remember, before a Hard Reset or an OS reload.........do a Backup with the Desktop Manager first!!!
........just in case.