I don't know if any of you out there are still have problems with commenting on Blogger. I know it's been frustrating me to no end! Well, I may have found a work-around today...kinda by accident.
When I was viewing a blog on Internet Explorer, I got stuck in the comment loop. You know, type in your comment, then go to the log-in screen, and type in your username and password 1,472 times! Frustrating, right?! Well, I decided to go to the same blog, but this time with a Firefox browser. Guess what? No problems! If I'd known it was that easy 3 weeks ago, I'd have been leaving a lot more comments for all my bloggy friends. :o)
So, this may be a little late getting to you...maybe you've already discovered a solution. If not, I hope this one will work for you. And personally, Firefox is just way cooler anyhow. :o)