At the beginning of the movie, when Cobb and Arthur are on the top of the building about to get into a helicopter to leave, they find Saito in their helicopter. During the dialogue between Saito and Cobb, the window of the helicopter behind Saito is wet and being rained on. But when the camera cuts to Cobb outside the helicopter, it is not raining at all. This happens multiple times in the scene. As the helicopter flies away at the end of the scene, there is no rain.

After Grace has been shot, when she and Jake are at the remote link-up site, Jake pulls a blanket up to Grace's shoulders, and the tip of it is still folded over. When the shot changes to a close-up of Grace, the blanket now lays completely flat.

In the beginning when Phil calls Lisa to explain they cannot find Doug, the three guys in the background are in a very different position than at the end of the movie during the same time period. In the end the drug dealer walks forward towards Stu and Alan and then Stu begins running over to Phil. In the beginning all of the guys in the background are farther apart during the same time of Phil's phone call.

In the scene where Lee pays a visit to Paul on the basketball court, he and Lacy are both wearing helmets. Lacy gets off the bike and after a little taunting, Lee drives forward. As he rides away from Lacy his helmet is on, there is a cut scene, and suddenly his helmet is off and Lacy is walking away with it.

When salt extracts the venom from a black widow spider, you see the underpart of the spider. If you look closely, there is nothing on its bottom. Black widows have a red hourglass-shaped mark on their bottom to show that they are female. Males -such as the one in the movie- do not contain the potentially deadly neurotoxin that the female does.

After Big Baby throws Lotso into the dumpster the toys walk over the dumpster and start planning how to get past the garbage truck. One of the LGMs (Little Green Men) then gets his feet stuck in one of the dumpster's lids. This couldn't possibly have happened, because the lid was closed after Big Baby threw Lotso in and the other lid was also closed.

In the scene where Watson and Adler are laying out the map, they place two objects on the map to hold it down. In the very next clip where it shows Holmes talking, you see Watson and Adler placing those same objects on the map.

Gamble and Hoitz get thrown to the ground when the accounting office explodes. In an overhead shot of them rolling around on the ground, Gamble's wooden gun has fallen from its holster and is lying on the ground. Cut to a side shot and the gun is back in its holster. Gamble had both hands covering his ears the whole time, he did not pick up the gun.

When Russel is complaining, when he says "Zoology" his face is covered in dirt. When Carl tells him that he can do his business in the bushes, he is instantly clean. http://www.youtube.com/watch?v=lOjhfcBNZW8.

In the scene when he is driving his daughter to the airport before she flies to France, it appears they are riding inside a late model BMW 5-Series. This is apparent by the tan leather interior and the double adjustable padded headrests and rear seat headrests. However, when they appear at the airport terminal, he is seen unloading the luggage from his personal car, a 2005 Nissan Sentra GXE with a basic gray cloth economy interior (Confirmed by the Features on the DVD release)