Can't create new Comments on Articles

So I'm kind of new here ... and I'm wondering how I can post on the Comments for Verge articles. I can Reply to others' comments. I can post in the fora (obviously). But when I try to "Add Yours" to a comment thread (whether there are others present or not), I get the little "loading swirly" for a split second, and no option to actually post. I admit, I haven't tried on my Firefox at home. I'm using IE8 on Win7 here at work (sssshhhh don't tell my boss). I've tried with and without Compatibility Mode, and I've done al the other typical troubleshooting tips. Suggestions?