When creating a new post, I can hover my mouse over HTML at the top right and it acts like it is a button, but when I click on HTML absolutely nothing happens. I am stuck in text mode only (very frustrating, as you might imagine).
Also, if I click on an image to change the settings, it separates itself from the caption.
Those are my only two problems since the upgrade to the newest WordPress earlier today. Obviously, the lack of ability to change HTML is the most pressing.