I've found, and have seen a few others notice this too, that since the big Blogger crash a few weeks ago, I can't comment on my own posts. I'm also not able to comment on other Blogger blogs. It gives me the run around with signing in.
I wanted to let you all know that I'm not ignoring any comments you may leave, I wish I could! And I don't think this is an issue the we bloggers can fix ourselves, and will need to be fixed by Blogger. Please continue to comment and as soon as I possibly can I'll comment.