For several weeks now I've noticed a continuing problem across various forums:

If I am on the next-to-last page of a thread – say, page 88 of an 89-page thread – and I click the link to go to the last page, instead the current page is redisplayed and I am taken to the top. In these circumstances, it is impossible to get to the supposedly last page of the thread.

Interestingly, this redisplay resets the new-message flag such that the thread no longer shows up in my unread-threads list. Another symptom of the problem is that when new messages are eventually posted, and the thread reappears in my unread-threads list, clicking the "First unread post" link causes me to skip over one or more posts that I've not previously seen.

Other users have reported observing this same anomaly, so it's not related to my individual account browser or other local setting. (See, for example, this post and replies to it discussing the problem in that same thread: http://www.flyertalk.com/forum/20447533-post1006.html.) There is reasonable speculation that the problem may be related to moderator deletion/merging of posts and the resulting renumbering/reindexing.