OS: Windows 7
Browser: Pale Moon v28.7.2
This just started happening two or three days ago but I am unable to logout without going to my Preferences page and using the Log out all link in the Recently Used Devices section.
Up until then I would click on my avatar which brought up my username which was a link. When you clicked on that link a drop down menu appeared and Logout was the last option available.
The username still lights up yellow when you scroll over it and the little hand appears to let you know it should act as a link but nothing happens when you try to click on it.