Last year, I was unable to comment on blogs. I couldn't figure out what was wrong, so I switched from Internet Explorer to Google Chrome and yay me, I was able to comment again. Well, my problems have come back. At first it was isolated to other blogs. I would post and click publish and it would disappear. Then, I tried to comment on my blog and still, no dice. So I read somewhere that switching from the comment embedded below the post to the pop up window or full page would help. I switched to pop up window and I can now comment on my own blog.
I know other people are having troubles too, so if you are thinking you aren't getting as many comments as you used to, switch to pop up window and see if it helps.
I would love to comment on your blog, but over half the ones I visit, I'm just unable. If you'd like me to test your blog with my failure as a comment-er....shoot me a message.