Ever since upgrading to UBB 7.2 we've been crashing 2-3 times a day. I did just upgrade PHP to the most recent 5.2.3 - we were a little behind on that. We will see if that helps.
We've been running MySQL 4. I've installed MySQL 5 but to be honest I'm very nervous about doing this switch - I can imagine all sorts of disaster scenarios. It takes many hours to back up my forum database so this isn't a casual switch.
Any suggestions on how to go about doing this?