Strengthen Skills Bug
I was practicing my German using the Strengthen Skills and after answering the first question it ended my practice saying I had completed it successfully, awarding me XP and a lingot.
This seems very much like a bug.
EDIT: Very true usagi, I'm on Windows 7 using Firefox.
I'm not part of the tech crew, but it would probably be helpful if you let them know what operating system and browser you're using. (For example, I'm using Windows7/Firefox). Thanks! ^_^