Ive had an aftermarket 4 port USB charger that I have been using without fail or incident until a few months ago. I plug my iPhone 4 into the same charger as I always have been since upgrading the iOS and I now get a message: "This device is not supported and may not function properly" Hmmm. I get this after upgrading my iPad too. The result is I have to sometimes plug in the iPad and iPhone several times to get a full charge! So Apple has written a line of code to ensure that we all buy apple chargers. Why don't they do something better with their time and fix some of the real bugs in their software for oh say iPhoto, and other programs?