Cannot comment on articles

I made a Disqus account, but cannot seem to comment on articles on the main site. I login, hit reply, type out the response, hit the button to post it, but the button just changes to `Just a Moment…’ and hangs there no matter how long I wait. If I reload the page, my comment has not appeared. I also cannot see any way to comment other than replying: the text box is down the bottom, but there are no buttons to submit it.

I use Firefox 11.0, Windows 7 SP1. I do use NoScript, but have Shoryuken and Disqus always allowed, and have tried allowing ALL scripts to no avail.