I had to upgrade the forum software to get the latest security patches for VBulletin. Our ISP was reporting some hacking activity that appeared to be coming from the machine that hosts the forums and forced us to immediately upgrade VBulletin.

Turns out it wasn't us, just someone spoofing using a forged IP that happened to be our IP address.

I'm still exploring all the new features - another upgrade from 3.8.x to 4.0 series of vbulletin is coming, so if you don't like the new features, just ignore them. It'll probably change even more with the move to 4.0.