I can't post a comment on any article (let's see if I can post this!).
In FireFox, I can see an infinite series of different ad-management sites being accessed in the activity bar. On Internet Explorer 8, the activity bar shows "Waiting for http://www.toms..." the web page on which I'm posting, and it stays there forever.
I'm behind a corporate firewall at the moment. If I remember, I'll post again from home and see if that fixes the problem. Thanks in advance for the help.