When I got home, tonight, I checked on the site, and it was down. Trying to load it yielded the following message:
MyBB has experienced an internal SQL error and cannot continue.
SQL Error:
145 - Table './grimfing_PBMnet/PBMnet_sessions' is marked as crashed and should be repaired
Query:
DELETE FROM PBMnet_sessions WHERE uid='1'
I managed to find a fix for it. I'm not sure what caused it, nor why it happened.
My apologies for any inconvenience. The site was working this morning, when I last checked on it.