If you've tried to buy anything from AllofMP3.com and had your card refused recently, this might be why.
It seems that both Mastercard and Visa have blacklisted the company, and will no longer be processing payments for them.
Apparently, their justification for their action is that Allofmp3.com is illegal.
http://www.theregister.co.uk/2006/10...nd_mastercard/