Mine had trouble at first, but I did a couple fixes (mainly the long hex thing in the chameleon file) and deleting that networkinterfaces.plist, so my purchased apps updated fine, but now my pirated iwork and ilife won't update because it said they were downloaded with a different computer. Now, I know that's correct, but i'm reading that apple isn't even cracking down on those updates now and pirated users are able to upgrade. what gives?
Same issue here as well. I get a cue to sign in, then "Update Unavailable with This Apple ID", and then immediately after that I get "We could not complete your request. There was an error in the App Store. Please try again later. (null)". I'm waiting to update iLife, iWork, and Aperture...