Anyone have an idea how to solve this?
My understanding is with iOS5 the iOS device doesn't auto sync when connected. iTunes might open depending on the setting when you plug the USB cable in, but it doesn't auto sync. You have to click the Sync button - which can be pressed either on iTunes, or in Settings on the iOS device.
Sync on iOS5 is done in the background, so you can still use the iOS device whilst it is syncing.
Unless you're using WiFi sync, and iTunes is running on your computer, when you plug the power into the iOS device, it will start syncing.
pro - on THFB - sync about 17.2mbps - BQM