Apparent fix for MSN Messenger 7 not displaying "What I'm Listening to" for iTunes
So, I've had a problem recently with MSN Messenger 7 showing "What I'm Listening to" for iTunes perfectly well, and then after using Media Player, suddenly not showing it at all. I think it's a great feature and it's really frustrating, but I have a fix.
It seems that somehow if you use iTunes and Media Player, MSN Messenger gets confused and somehow can't read the correct API calls for the correct player.
What you need to to to fix this issue is make Messenger think you're a new user again. To do this edit the registry in the following way: (Please remember if you don't have a clue about editing the registry, it wise to make a backup before trying this)
Go to: HKEY_CURRENT_USER\Software\Microsoft\MSNMessenger and change the value of the key FirstTimeUser to 1.
Restart Messenger.
This should do the trick.

