I am at a loss as to what's happening to the forum database. But this is the 2nd time that all the messages were lost for some unknown reason. And when I went to restore from the latest backup that I had, it was somehow corrupted and made the forums completely unusable. So I had to go back to the last known good database I had again. There isn't any logs showing the server had crashed or anything this time so I don't know what's going on.
