This is very minor, but it would be nice to see it implemented. Would it be possible to have a copy of this show up on the bottom of threads you are reading? (I think some call it a Cookie Trail?)
It would save some time from scrolling back up to the top of the screen after reading a post to navigate back somewhere. The only reason I ask is because if you just hit the back arrow, then the thread will not show up as one you have previously read.
Again, very minor inconvenience, but it would add some user friendliness to the forums.