comment error

Hi,

Any time anyone tries to post a comment on our site (http://isageeks.com), WP returns the following error:

Error: please type a comment.

I was previously on 2.9 (I believe), and upgraded to 3.0.1, but the error is persisting. I’ve also attempted deactivating all my plugins to see if they were causing the issue, but no dice there, either.

Here is the contents of my comments.php file:

[Code moderated as per the Forum Rules. Please use the pastebin]

Any thoughts as to what might be going on? My apologies if I’ve missed something obvious – I’m an Expression Engine refugee, so I’m not 100% with WP just yet. 🙂

Thanks!