"iOS 4.2 Software Update for iPad" "iOS 4.2 Software Update for iPad" "iOS 4.2 Software Update for iPad" "iOS 4.2 Software Update for iPad" "iOS 4.2 Software Update for iPad" http://support.apple.com/kb/DL1060 "iOS 4.2 Software Update for iPad" http://support.apple.com/kb/DL1060 http://support.apple.com/kb/DL1060 Apple’s release note "iOS 4.2 Software Update for iPad" "iOS 4.2 Software Update for iPad" "iOS 4.2 Software Update for iPad"