Running Windows 7 Ultimate 64, and ObjectDock 2 Beta.
When ObjectDock is running, windows media player is not brought to the foreground when it opens, it will come to the foreground if you click the icon in the task bar though after its running. I only have shortcuts running on my dock, none of them are a media player shortcut.
I have tried objectdock's Interactions set to Keep On Top, Hide In Background, Hide Off Screen, Keep On Bottom, none of them makes a difference. If I shut down objectdock, windows media player behaves normally.