Got it fixed. It was from the Who viewed this thread hack by Kentaurus and luckily he showed up and fixed it. You're right, it apparently wasn't that line exactly. That line is used in the code addon for his hack that gets the usernames in the html format (like for Admin and Mods and such).
I'm curious, how did you test it if you don't have the hack installed? The reason I'm asking is that it might help me in the future if I run into something like this again.