Problem with "next thread" link

For the past week or so, my "next tread" link simply refreshes the thread I was currently reading and takes me to the top.
Any ideas, is this my computer or a bad cookie or something? I'll have to try from anohter computer and see if that fixes it. If not, any suggestions?
Thanks

same thing with me...although this is the first time I have noticed that button, and I don't use it...