Corrected entry: At one point, Han yells from inside the Millenium Falcon for some help to two storm troopers guarding the entrance to the ship. You can hear 5 laser blasts indicating that Han has shot and killed the stormtroopers. But why is it that when Luke and Han wear the uniforms that the Stormtroopers were wearing, there are no signs of blast marks anywhere on the entire uniform?
Corrected entry: Right after the sand people attack, Obi-Wan encourages everybody to get a move on because the sand people would be coming back and in greater numbers. Immediately after this, there is a shot of the building that they all take shelter in; if you compare the size of the building with the size of the speeder that is parked outside, you can see the building must only be only about 5.5 feet high!
Corrected entry: R2's beeps and whistles can only be interpreted by another droid (3PO), or Luke's on board X-Wing computer (as seen in TESB). With the Death Star approaching the Rebels begin to mount their attack from the Fourth Moon of Yavin. As Luke jumps into the cockpit of his X-Wing a member of the ground crew says "Hey this R2 unit of yours is a little beat-up, do you want a new one?". To which Luke replies "Not on your life, that little droid and I have been through a lot together. You okay R2". The little droid then beeps at Luke and Luke says "Good". For all we know R2 could well have been saying "No not really, I've been shot at and chased by Imperial Troops all day. I'm a little scared of this whole being in space making suicide runs on the Death Star caper, and if it's all the same to you I'll stay here". To which his new master says "Good", and promptly blasts off into space.
Corrected entry: After our heroes escape from the Death Star and defeat the TIE fighters sent to pursue them, Leia tells Han, "They're tracking us. It's the only explanation for the ease of our escape." If she knows the empire is tracking the Falcon, why then does she fly straight to the secret rebel base, thereby leading the Death Star right to it? Why not go to some other location, transfer to a different ship (with no homing beacon), and then go to Yavin undetected?
Corrected entry: In the bar on Tattooine (where Luke and Obi-Wan meet Han Solo), you see lots of aliens at the bar. Look carefully in the background of these shots, and you'll see a NASA astronaut in full space walk gear (helmet etc) walking across the back of the shot, complete with American flag on his arm. It's quite obvious once you know where to look.
Corrected entry: When Leia is hiding on the ship, 3 troopers come up, when she shoots one there are 4 of them and when she is stunned the dead trooper is gone.
Corrected entry: The number and configuration of cockpit windows on the Imperial TIE fighters changes depending on whether the shot of the fighter is interior or exterior.
Corrected entry: Near the end of the sequence in which R2-D2 projects the hologram of Leia to Luke, 3PO is holding a rag. In the next shot he isn't holding it, then, when he says "I'm sorry, sir, but he appears to have picked up a slight flutter," he's holding it again, and in the final shot, the rag is gone.
Corrected entry: This is only on the new DVD. When the 4 Tie Fighters are attacking the Millennium Falcon, there are shots of the Tie Fighters with a faded red box that surrounds them.