[quote=@Hank]
<Snipped quote by Sherlock Holmes>

Hidden threads. The same thing happens in threads where the total post count will still include the hidden posts. Because the threads are still technically there, the forum creates a number of pages to accomodate them but if you actually try to go to those pages you'll run out of threads to view because they're hidden so you end up with empty pages.
[/quote]

Ah, I see. That makes sense. Thanks for the info, Hank.