Internet Explorer seems to have problems with MSN Music.
If I navigate to it normally, IE7 crashes. I've tested with
the worldwide MSN Music site (music.msn.com) and also
the Australian version, incorporated with ninemsn (music.ninemsn.com.au)
If I click someone's "What I'm Listening To" song in MSN Messenger, which should launch an MSN Messenger window displaying a special page at MSN Music (powered by Internet Explorer), with search fields filled in for the song that you clicked. Now it sends me to a page telling me that I need Internet Explorer version 6.0 or above to access MSN Music.