My Wikipedia has stopped working in 3.6.4 in firefox browser 1.5.0.8
It mall formats the actual link. You can see an axample at the beginning of an existing post at
http://www.physiobob.com/forum/showthread.php?t=3510
The first word was a link working perfectly until a recent upgrade. This might be a firefox issue or it might be a vbulletin issue. This is because I also have now seen that my plugin which does the same thing for adding utube plugins is also asking to install a plug to make it work!
I attach a screen shot of that as well for you interest in case it help to work out where the issue might be coming from