Looks like everything is ok, however something is modifying the links to insert the urchinTracker onclick. I am not sure if this is what is interfering with the clicking of the links, but seems like a likely culprit.
Regarding adding $wowchar_menu manually and clicking Yes, I am sure it might cause some issue as it wasn't intended to be used in that manner. It would probably try and add a second $wowchar_menu which probably messes with vBulletin's javascript or your urchinTracker insert thing.
However, everything looks fine for the most part on your install accept for the urchinTracker insert.
Thank you for clicking Install