User blog comment:Gershtoot/Black Ops PC patch released/@comment-1729910-20101217151305/@comment-86.123.20.128-20101218182449

I think it's related to camo/emblem/clan tag. You see, when you prestige, that stuff doesn't reset properly, so the game will think you bought them anyway and substract money from your account. Ya see, if you don't have the required money, the game's system does not allow negative cash, so they reset your class. Simple? No. Annoying? Yes.