Ran into an issue again with this post today and creating a new post and attempting to view page two of the post didn't seem to fix it. I'll do a repair on the forums later tonight to see if it has any effect on things.
Probably nothing terrible
Just a corrupt database
Alas, YaBB has managed to show itself as "not the only forum board that has database problems"
(Be sure to back us up some time soon as well, Nathan)
Edit:
I should probably also mention that when I get topic replies, and click the link, it no longer brings me to the newest post
Anyone else having this problem?