Continuity mistake: When Arthur is shot in the head, at first there's no bullet hole in his head, but in the next shot there is.
Continuity mistake: In the scene on the airplane when they are setting up to go under, Yusuf takes a sip from a wine glass and goes to set it down. Then in the shot immediately following he no longer has a wine glass in his hand. Instead he is buckling his seat belt. (01:03:50)
Revealing mistake: When the chase in Mombasa has just begun, the camera is moving in front of Cobb at one point. Notice how the people behind the camera are moving into Cobb's paths, despite the fact that they weren't there a second ago?
Continuity mistake: As Cobb is explaining to Ariadne the importance of imagining new places to create dreams, the positions of his head, arms and hands change between shots.
Answer: The answer above is solid and I agree, but there's another plausible way of looking at it. It is implied at the end that Cobb could still be dreaming (we never see if the top stops spinning). If that's the case, then he would likely dream his children to be exactly how he remembers them.
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