It appears that commenting is broken for this blog. If you try to comment then the comment box pops up but if you click in the box to type your comment it just displays "Opening..."
I have mentioned the problem in the Blogger support forum but I haven't received any answers as yet. I'm hoping they will realize there is a problem and do something about it.
I am wondering if this problem has occurred since I Google+ - enabled my blog. I mean, I know it has, but I'm not sure if commenting broke after I enabled it. And I don't know how to un-enable it.
The only thing I can think of trying is to go to one of Blogger's standard boring templates. Because commenting still works on One Foot in the Grave, which uses one.