When I scroll down the page on a thread, I get the bar that has Active/I'm on/I'm watching, FB, Twitter..blah blah, that follows down the page with me.
However, if I then post on that thread, the bar is frozen. I can't click any button on there at all. But, it's not all the time. Sometimes I post and it's fine, other times it's completely locked up and the only way to unfreeze it is to either close the tab or refresh the page.