We moved our forums to another site. The fact that's all that you've noticed is a good thing We changed server, sites, exported, and imported everything.
Some of the stuff looks like it'll be rebuilt by these bulletin boards over time automatically. I suspect search will work on all old posts once indexed. Last night everyone had 0 posts. Look at me, I went from like 1000+ I think to 0. I think that's because mine is the main account and that one couldnt be exported/imported.