"It solves the mystery of where the line came from at least, but not why it is showing up that way." - DemoniaD
Why it's showing up that way probably has something to do with the security software the company I work for installed on this laptop (it's their computer, not mine), or how I'm accessing the forum.
Since I've been here, I haven't been able to use the "Advanced Editor" page. That's likely attributable to how I log in as well. I haven't really cared because I can reply and post links just fine in the "Quick Reply" boxes at the bottom of every thread. Apparently that issue also affects Private Messaging as well, because I got a PM I'd like to respond to, and there's no text box for me to enter my reply in. I hope the person that Messaged me doesn't think I am ignoring them. If they would be kind enough to e-mail me instead, I'll happily respond to them.