Today, I was trying to mount a truecrypt volume on my ubuntu machine. Even though truecrypt wasn’t running, it kept telling me that truecrypt was already running when I tried to open it. I found this article on the Ubuntu forums talking about the same problem. The solution? Simply delete the .TrueCrypt-lock-username file in my home directory. It worked just fine.
[Update 2012-12-26 15:25:23] Some of my links were bad. I’ve updated them.
Image from hherbzilla via flickr