Our forum has been converted from vbullletin to xenforo due to an unpatched security hole in vbulletin:
vBulletin.com Hacked, Customer Data Stolen
Password hack of vBulletin.com fuels fears of in-the-wild 0-day attacks
That vbulletin exploit is now being offered for sale by a well known hacker group. Vbulletin's consistently terrible customer support has not yet provided a security patch or any real info to their customers about what happened or how we can protect our sites. Every forum run on their platform may now be vulnerable.
A member of the staff from xenforo forum was hired to perform the actual database conversion and he also installed a much better search engine for the new forum.
I didn't explaining this on the public side until after the forum had been converted because I didn't want to alert wanna be hackers to the potential security hole.
I apologize in advance for the inconvenience but it seemed better than leaving the site vulnerable to hackers.