I've noticed that if you change the time or date on your computer back for any amount of time then when you come to the forums it causes problems. Threads still show they have new posts on in them but after you open them you have to push the refresh button to see any new post up until the computer reaches the time is was at before you changed it. I don't know if theirs anything at the site you can do to fix it buts it's still nice to know.