I want to put the latest update to vBulletin in at some point soon to version 4.1.10. Should only take 10mins. I've done it at Free-DC now, had lot of problems but they were all due to a security mod in apache I had to disable first.

I'll run a full backup before I do it, maybe this evening or more likely tomorrow morning.

I don't think there are too many changes, so likely you won't notice anything but it might affect some of the custom styles.