There should be a "write something" box at the bottom. Click it and then it works. You must be logged in for it to appear.
This is what it looks like when I'm logged out
Idk if I'm on the newest one I think I am, it updates automatically for me, I've had the crash problem, and also the user name and on system. It's weird tho it will say my name but I'd I send a pm it will still send to the person. Also inbox doesn't refresh unless I go to it but not a big deal