Comment Problems, or Conservative in Virginia Saves the Day
"I searched and found why I couldn't leave comments on your blog. Or rather, how to fix the problem, not what caused it.
The word verification would pop up but not show an image. I added www.blogger.com to 'allow cookies' (actually, I think it's 'allow session cookies') and then was able to see the image, enter the word verification, and leave a comment.
If you get other complaints, you might point them to this discussion."