Plot hole: When the Allies blow up the airfield they pour gunfire from the backs of the trucks into the tents where the Japanese soldiers are eating. If you watch carefully you will see that the Allied guys in the truck nearest the screen are pouring lead through their comrades in the other truck. Another classic case of 'friendly fire'.
Continuity mistake: In the scene where we see Steve McQueen in a jeep waiting for the plane to taxi, he is chewing gum. He then he takes the gum out and sticks it on the top part of the windscreen frame of the jeep. In the next shot the jeep arrives where the plane is and there is no sign of the gum on the windscreen frame.
Continuity mistake: In the scene where we see Frank Sinatra and other soldiers leave the hospital ward, and follow a nurse into the Colonel's office to protest about the awful meals they were given to eat. On the Colonel's desk is a revolver in it's holster. In the next wide angle shot of the room the revolver is out of it's holster on the desk.