See http://i189.photobucket.com/albums/z258/Almonaster/Pagebug.png
(Other pages show a link to the final empty page.)

I'm guessing it's an off-by-one at end of page?

fixed (with a post)

No, the reply count for that thread become de-synchronized with reality for some unknown reason (which would be the real bug, here), thinking there were two more posts in the thread than were actually there.

So it's an off-by-two error, actually.

I re-synchronized the count, but have no idea why it messed up in the first place.

I'm seeing the same thing again, this time in "What's your phobia" in the General Discussion section. Post count shows as 76, with 3 pages of actual posts.

I see that as well.

Possibly the 503s are to blame?