It sounds as if this was just a premature automated response because of some slight delay. Clearly the confirmation did go through because your post has in fact appeared on the site. I don't think there is anything to worry about.

Apparently, Kenjay is correct. I am logged in and am posting this reply. However, when clicking on the link to activate account, I still get a sorry problem message. I plan to delete the email with the link and call it good.

Thanks, problem solved.

Something is wrong

We could not activate your account. Please make sure that you have clicked the correct link in your email or typed in the correct address.

And my new post is not on the forum. It's titled "how do I get rid of the blank space at the bottom of the new Firefox menu?"