Unknown exactly. It was mainly the msgboard timing out whenever you tried to access any of its manin scripts, but other things, like the voting poll, were acting weird too. Basically anything having to do with MySQL.
The tech that was handling my issue copied the entire site over to a different server to use it as a test bed, and it turned out to work just fine on the new server, so we're keeping the site on it. They're still trying to figure out exactly what was wrong with the inital server, but more than likely, it's something to do with MySQL and/or PHP on that box.
I also got my storage upped from 5GB to 100GB for free