I did the update and ran all of the recommended updates after the plugins updates, but now I'm finding that the comment authors are wrong. Fortunately, I don't have that many comments on the blog.
For instance, I am the site admin. Comments I left used to show the admin or post author badge under my gravatar and if I clicked the comment author info it would show how many comments I had written.
Now, every comment I left has a different @ username for user mentioning. I have a post I've left a few comments on and they are all attributed now to a different username (one (@guest_7), one (@guest_49), etc even though I'm site admin. And if I click on any one of them to bring up the comment author info popup, it says that I have 0 comments.
I've tried editing the comment, but it still attributes each one of them to a separate guest account.
Here's a post with just a few comments made by me, each attributed to a different guest @username:
And when I tried editing my email, I started getting the default guest icon I set in settings.
And, speaking of that, I set a default guest icon and it's showing in admin but not for a guest on the front of the site.