Symptoms: Being awoken iPad / iPad 2 / iPad 3 or even the newest iPad mini / iPad 4 shows Home screen with one or more icons that are grey and indicating that relevant apps are in waiting state. Turning OFF- ON tablet or hard reset does not resolve the problem and waiting icons persist. To fix this:
That is it. Waiting icons on iPad / iPad 2 / iPad 3 as well as on iPad mini / iPad 4 should disappear.