I have two iPod Touches - well one mine, one my brothers - and one iTunes account. My query: I have bought the upgrade for my iPT and everything has installed ok - but I can't buy it for my brother's using the same iTunes account - simply no option to buy it - where the "Buy" button should be there is just a warning saying "Sync your iPod touch and click Check for Upgrades...." Anyway around this without seeting up another account?