Continuity mistake: In one scene, Zane disturbs a lecture on terraforming at JPL and gets thrown out by security guards. Later on in the movie, somewhere in a Mexican bar, Zane and Ilana are discussing global warming. In a flashback Zane remembers the lecture at JPL. Strange thing, however, he can even remember a part of the lecture which was given at a time when he had already been thrown out.
Continuity mistake: Near the end, when Charlie Sheen is in a room trying to program stuff, he blocks off the door with an axe so no one can get in. When the van breaks the door, watch the head of the axe - it hits the floor, but mysteriously pops up and goes towards Charlie to miss him by an inch or two.
Revealing mistake: When Kiki's legs "reverse" at the end of the film as he runs off, watch closely. It is clear the effect was achieved through some shoddy image-manipulation. His clothing and hands "warp" slightly a few times around his legs.
Factual error: When Charlie observes the taxi driver at the gate to the facility, he sneaks in by stowing away in the front of the Volkswagen Bug. The luggage space in a bug is barely enough room for a child, plus there is no inner latch release, or handle to close the door.