There's a very long thread page in Elemental Ideas. When I try to view it in FireFox, the last bits of the last post are cut off and there is no reply box nor final page boilerplate (other than the (c) block, which looks to be outside the table that contains the posts & reply box).
When I view the page in Opera, I see all the text of the last post, and the page bottom I'd expect to see without being signed in.
Has this particular argument found some character or line limit for thread pages in the forum code?