Comments not working after 2.6.2 update

I just updated to the latest WordPress (2.6.2) the other day. Now I noticed, when I go to make a comment in one of my posts, it asks me to log in (I’m all ready logged in as admin) so, I log in, nothing happens, I’m still not able to comment. I tried logging in as a user to leave a comment, same thing. Seems like there’s no way to leave a comment now. I’m set up to only let registered users leave comments. It worked before. Any ideas. And yes, I’ve tried search.

Thanks