I think someone said it had to do with the skin TCPMP is using. Or, maybe it was the skin / background in WM? Actually, I just live with it. I know where the play button is, so I just press that black spot on the screen
Edit: Go to Start --> Settings --> Today. Select something other than "Sprint". Now, I can see the buttons.... But, I think I'll go back to the Sprint theme because I like that one better.