At least it's working for you. I checked the help section on blogger and it appears it has to do with the way some people have their comments section set up. At least they are aware of the problem.
I got an email from a reader of my blog telling me that he's been having issues posting a comment. I think it's a Blogspot issue.
I have had this problem before. It sucks. Once I got a new laptop, the problem went away for some reason.
I got your comment from last night, so it appears that I am lucky enough not to be having the problem.
it's all in the way the blog is set up for comments. Like yours, the little pop up window works fine. But other ways not so much.I can't even click on some to read the comments, let alone leave one.