One thing I really really REALLY don't like about Vbulletin, is that with yabb when you hit back browser, it refreshes the page to reflect that you've read a thread or section. However with Vbulletin when you hit back browser, all those things are exactly the same as before INCLUDING notifications. Damnest thing is, I can't remember how to get IE (yes I still use IE and absolutely hate FF, Opera and Chrome) to refresh the page any time it's visited (which doesn't seem to affect if you backbrowser)
Does this occur on FF, opera and chrome?
I know that this has a lot to do with caching of a site and apparently Vbulletin has no need to purge the cache any time a page is loaded like Yabb