It has always bothered me that clicking on the arrow to go to the last page of the thread or any specific page number does not mark a thread as read. It seems very counter intuitive to me. When I'm following a long discussion I simply click to the last page because I've already read everything on the first few pages. Once I've read all the new posts on the latest page I've "read" the thread. The only way to mark a thread as read is to click on the title hyperlink, which takes you to the first page--which you've already read.
Being slightly obsessive-compulsive, I usually end up clicking on all the text hyperlinks of long threads after I've read the last page simply to mark the thread.
It's a trivial issue to be sure, but I feel the system would make more sense if clicking any link to the thread from the thread list would mark the thread as read whether it be the title, the page number, or the last page arrow.
Edited, Jun 20th 2009 2:15pm by Allegory