It was brought to my attention that the Amazon banner, which gets me about 3% in commission when someone clicks on it and buys something, wasn't showing for people not logged in.
I looked into it and found out that there was an error merging vBulletin versions last year, which caused this to malfunction. I fixed it. I also removed the useless "posting permissions" box at the bottom, which was taking up a lot of the screen if you scrolled down.