The replacements are in the right places, and only the links replaced are showing an extra '/'. This only happens in IE, I tried it on 2 separate computers and both is the same. None of this happens in firefox.
I took out the forumdisplay.php on the footer (marked forums read) and the link is no longer replaced and no longer showing the extra '/' while the others, showgroups.php, sendmessage.php, archive, is all showing the extra '/'.
Logged in, registered or admin account, or as guest makes no difference. Even on default skin with no changes made, and no changes has been made to any vb
or vbgallery php files.
EDIT: Also just tried it on google chrome, and it doesn't happen. So this problem was limited to IE only.