I've noticed on a few different boards (UBB is the last one I saw) they sometimes have a link, usually in their FAQ, that says:
[:"red"]Clearing Cookies
If you ever experience login problems, you may have a problem with the cookies that have been set in your browser. If this happens, you can try clearing all cookies set on this message board by clicking {link here}.[/]
It looks like it's javascript. Has anyone made one like this for UBBT? If it helps, I believe you can clear a cookie by setting the same exact cookie only for a time earlier than the present time. So it's read by the computer, rewrites the current good cookie, but it is set to a time earlier than the current time -- the computer then reads it as already expired and the cookie is dropped.
