To make it worse, if you land on the first page of a thread with more than one page and the first unread post is really on the first page, FT will assume that you've read the entire first page so that when you click to go to the first unread post, it will send you to the top of the second page instead of showing you where the unread posts start at the bottom of the first page.

I've been having problems since the last IT update to FT that have made me very aware of this. When FT removed the separate colored icon on individual posts to show exactly which ones had already been seen, I started to also have problem in that when I click on the black box before the bold thread title (as opposed to the thread title itself) which should send me to the first unread post, sometimes it works properly, sometimes it sends me to the first page of the thread, and sometimes I land at the top of the page containing the first unseen post.

Needless to say, I don't use infinite scroll.