iTunes was preventing me from logging out and every attempt I made to close it failed, because it immediately started up again. So I removed it by using terminal to kill all the iTunes processes and sudo removed the iTunes App. Then I opened the image and install iTunes again. Everything seemed fine, but every 48 hours or so, a particular podcast video I downloaded several weeks ago, keeps opening and playing at random! What's going on? How do I fix this? I have no idea.