I upgraded to test if a plugin worked with this version. I made my first new post and noticed that automatically comments are disabled on this post. That was not the expected behavior, nor the behavior I had prior to the upgrade.
I use Disqus for my comments, but I also use a couple other plugins to fight spam. I've looked for global settings in discussion, general, Disqus, on the post edit page. I can not figure out how to enable comments on this post, nor do I know why comments were disabled and why this appears to be automatic for new posts to my blog.
Last night after the upgrade I edited some existing posts and added comments to existing posts, but this was the first brand new post I created with 3.2.1 and one of the key blogging features, comments, is not working.