Revealing mistake: When Amidala and Anakin are eating and he cuts her a piece of the fruit and "floats" it back to her, the bite appears in the fruit a split second before she actually eats it. [This appears to be fixed in rereleased versions]. (00:53:40)
Revealing mistake: When Anakin and Padme's shuttle arrives at Naboo it flies over a lake and lands on the other side next to some trees. Even though the trees are visibly reflected in the lake, at no time is the shuttle ever reflected on the lake when it passes over it and lands by the trees. Bizarrely though, its shadow is always visible. (00:38:35)
Revealing mistake: During the scene at the dinner table with Anakin and Padme, Anakin makes a piece of fruit fly around. He then has it land on a plate and cuts it with a fork and knife. It happens fast but you don't really even need slow motion or pause to see that the fruit doesn't react to Anakin sticking his fork or knife in it at all. The knife and fork just vanish into the fruit. (00:53:20)
Revealing mistake: When Obi Wan uses the Force to take the little crystal sphere from the map reader, the map reader disappears before it retracts into the floor again.
Revealing mistake: In the scene where Anakin explains to Padmé that he must go home to find his mother, you can see in the bottom left corner that it is raining. They shot the scene on a rainy day, and then filtered out the rain on computers, but ILM forgot a few small spots.
Revealing mistake: When Obi-Wan is cut by Dooku's lightsaber and falls, you see one of the wounds (the one on his arm) glowing and then suddenly seem to shrink and disappear, though not totally. This is because it is computer generated and didn't match up exactly with the actor portraying Obi-Wan. Hard to catch, but it is there.
Revealing mistake: After R2-D2 begins to drag C-3PO's head across the arena, there's a shot of several Jedi fighting. A man wearing a dark brown tunic falls over dead, but if you watch closely, you can see that he was never actually hit by any laserbolt. (01:50:15)
Revealing mistake: When Anakin is talking to Palpatine, the shot pans to the door, and it is obvious that the door and the furniture are painted. (00:26:15)
Revealing mistake: When Anakin and Dooku are crossing the hangar shortly after Anakin's green lightsaber was destroyed. Anakin slices a thick cable on the ground causing the lights to flicker. Even at normal speed, it is blatantly obvious he never actually hits the cable, and furthermore the pyrotechnic effect is slightly out of synch with Anakin's motion.