What cache file bug? It's probably a feature

I think it happens on the third page of a thread. Comments don't appear even though the thread gets bumped. At some point, when there are like 10 comments on the 3rd page the comments appear. This happens on every subsequent page of the thread.

Caz's trick is to go back to one of your non-appearing posts, which you have to find by cycling through the post ids, since post history is deactivated in the profiles, and edit it. That somehow flushes the cache.