Why can't I see posts past page 83 in Firefox?

In the padded room I can't see past page 83, post #1645 in the thread "Part 2: Padded Room Special Collection Of Junk That More Than Likely Will Be NSFW." (Not that its a bad post to get stuck on, but I am in need of new debauchery.

I've tried refreshing, going into the thred through the >> button that takes you to the most recent post, loading pages previous and pressing the next button, going in through the "new posts" then into the thread, pressing the "last" page button in the thread etc.etc.etc. No luck.

I can, however, see the newer posts in Chrome.