I just upgraded to 2.1. However, I am unable to post comments on my own blog, and it seems that others can't either, as I have received no comments at all today. Furthermore, all but two of my test comments have disappeared. It still shows the number of comments under the post, but when I click to read them, nothing shows. Now just so you understand what I'm talking about, the address of my blog is http://www.theurbangrindblog.com
I was able to insert test comments into the first two posts. However, nothing happens when I try and comments on previous posts.
So if anyone has any suggestions/recommendations, I'm all ears.