You gotta be kiddin'
Once in a while those guys from Microsoft publish some really nice KB articles. Just read this one and have a good laughs (txs Sérgio):
Q257875: STM file association changes when you install a third-party MP3 player
(By the way, who in his perfect sense would install an MP3 player on an Exchange Server?)
There are many, many others. You can find a nice collection at this link:
Funny Microsoft Q Articles