I just noticed something tonight, my MBA 11 won't charge my iPhone 4 from the right side USB. I kept getting a message saying that the USB device is drawing too much power and therefore the usb device will be disconnected. I then plugged it in to the USB on the left and it worked as expected. I never noticed this since I always charge it from the left USB. Can anyone else with an 11" MBA, test the charging ability of right side USB? Also, the fans would kick up very high when I plugged in the iPhone to the right side USB.