A class action lawsuit filed in a California court against Sony BMG alleges the music publisher included hidden software on a number of music CDs capable of wiping out users’ information and crippling their computers.
The suit, which was filed on Nov. 1 by Alexander William Guevara, claims CDs containing Sony’s new XCP2 anti-piracy program can damage users’ computers. The software, called a “rootkit,” automatically installs on computers with Microsoft’s Windows program and hides deep in the computer where it can monitor activity and cause system crashes.
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rootkit also is known to copy your listening habits and ip addy and report it back to sony... sony can say it's "their" property but i beg to differ... i paid for the damned cd - it's mine!!! (oh wait... i haven't bought a cd in 5 years...

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related article...
how to get rid of the bugger - if yer lucky...