Posts have gone.

[vertex9]

I was just mass-moving topics, and when it was complete, all my posts had gone, yet they were still being displayed as being on the board somewhere, which leads me to think that they were moved to a non-existant forum :\ Help!

[Steve Machol]

The only other time I've seen this happen is when posts were moved to a category by accident. I was able to use the mass move function to move them back out of the category into a forum.