Hey guys, I really want to download the IAP for Garageband to get the extra drummers but I can't! I click I want to purchase in the app, then it asks for my password. I put it in, it says do I want to pay £2.99 - I say yes and put my password in again - it then opens up the app store where I am presented with a blank white screen! I've tried rebooting the machine, and reloading garage band loads of times Is anyone else experiencing this? Any tips!? Thanks! Rich.