An anonymous reader writes: SpaceX has cancelled the launch of a Falcon 9 rocket after identifying a potential concern during preflight testing. This is the third straight day technical issues or weather have caused a delay. "Today's Orbcomm launch attempt has been scrubbed to address a potential concern identified during pre-flight checks," a SpaceX spokesperson said in a statement. "The vehicle and payload are in good condition, and engineering teams will take the extra time to ensure the highest possible level of mission assurance prior to flight," the statement said. The rocket is now scheduled for a Tuesday launch.