I just updated to 2.2 and I have two issues now:
When someone comments on one of my posts, I get a notification-email as usual but the body is empty/blank. Usually the content says, Author, Email, URL and so forth, but now the notification emails are completely empty. The subject is still the same ie: [Petersen Inc.] Comment: "Spock - The People Search Engine"
The other problem is when I comment on my own blog from Firefox. The page goes blank when I press Submit Comment and the comment isn't posted. It works fine in Internet Explorer 7.
I am using MySQL 4.1 and WP 2.2.