Wow.
You just got rickrolled.
The best thing you can do is to delete all temporary internet files, history, cookies, index.dat files, download locations, and even chkdsk file fragments using a program like
CCleaner.
It's either you, or the person who posted the thread.
They probably uploaded a tiny-url or something to the thread title (which is weird because they'd have insufficient privileges) to make it look like that since you're only seeing that in the 'Items' board.
Wait for some time and see if you stop seeing it yourself.
Last edited by firebolty; Aug 16, 2011 at 10:38 PM.