Makensie, has the problem reoccured since you posted this message? The server somtimes misbehaves when there are a lot of people logged in, but it's been running pretty well the last few weeks. I'm still tuning the new server, but I think it eventually should perform wll up to 80-100 simultaneous users.
It can also happen (very occasionally) if something gets messed up in the database with a particular case. If that were the reason, it should have stopped after you finished that particular mystery.
Either of those sound reasonable?