On my Windows 7 desktop, TweetDeck was not minimizing to the task tray. It wouldn’t close, as in quit, it would just disappear until I opened it again via an icon either in the start menu or desktop. I asked @TweetDeck about it but they never got back to me and it’s fine since I took care of it.
To fix this problem, I just uninstalled TweetDeck and then reinstalled. No big deal. The only reason I’m posting this is because I searched for the problem and nobody else talked about it.