Hello Dave,
If this is Brightmail 6, I would suggest restarting the Tomcat service on occasion. This can help negate potential User Interface display issues. It also sounds like you may be running into some issues with the SQL database, so running a MySQL check and repair may be in order. You can find information on how to do so in the following document:
Title: 'How to check or repair a MySQL database when errors are returned for the installed version of Symantec Brightmail AntiSpam'
Document ID: 2004110407532763
> http://service1.symantec.com/SUPPORT/ent-gate.nsf/docid/2004110407532763?Open&seg=ent
As a side note, I would also suggest running the following command after running the auto repair:
"mysqlcheck -ubrightmailuser -p<paste password here> brightmail --optimize"
It is also best practice to run these on a scheduled basis. So once a month or so depending on how much data goes in and out of the quarantine.
I hope this helps!
Thanks!