Unhandled excpetion errors are common and difficult to troubleshoot. You have to wonder if the "row" in in SQL. You may want to try going to Amazing Utilities and running a few of the utilities:
Check Amazing Charts
Optimize Databases
Emergency repair of corrupt databases
Reindex databases
I would do these one at a time and see if you lose the error message. Always do a backup prior.
If you click on details and copy and paste them to a post, it will give us more information to go on or at least give us a worse headache.

Good luck.