MyBB Community Forums

Once in awhile, I am emailed an error from my forums. It doesn't happen all the time. I have had a bot or someone on a regular basis try to register but I have it set that all that register must be activated by me. I ban them for about a week them delete them. I haven't tried banning IP's or email addresses yet. Just banning by name.
Any suggestions on this error?

I am running ver. 1.6.10

Your copy of MyBB running on Forums (http://www.rageinpaint.com/forums) has experienced an error. Details of the error include:
---
Type: 20
File: (Line no. 0)
Message
SQL Error: 2006 - MySQL server has gone away
Query: SELECT filter, fid FROM mybb_banfilters WHERE type='2'

Thanks,

Bob

website works fine for me ?

The site works fine for me also. I did have one spammer register this morning. I received eight emails with this error ranging from midnight to three a/m. Would this error come from a spam bot or someone trying to break into the forums?