Continuity mistake: In the scene where Burnett stops the Pickup truck and it skids. The blond haired passenger on the truckbed is leaning on the rail and suddenly on the next shot he is leaning on the truck cab. (01:03:00)

Continuity mistake: After Stackhouse and Brunett has been shot down, we see the front part of the plane land and the inscription "Made in U.S.A" is writing on the right front of the plane. That wasn't there earlier. (00:22:10)
Continuity mistake: Owen Wilson is carrying an AK47 with a wooden full stock when going to start the beacon on the ejection seat. When he is retrieving the film from the ejection seat, his rifle has a side-folding stock metal wire stock.
Continuity mistake: Towards the beginning of the movie when the F-18 is taking off to go on the recon mission, it shows a lot of different shots of an F-18 taking off. One of these shots is actually of an F-14.

Continuity mistake: When Owen Wilson parachutes through the trees, his oxygen mask goes from being on, covering his face, to being off and dangling. This repeats when he drops from his tangled chute. When he initially cuts free, his mask is over his face, then when he gets up it is off. A pilot should keep his mask on and visor down after ejecting over land to prevent injuries to his face and eyes should he wind up in the trees like Wilson did. (00:24:40)
Continuity mistake: The SAM that's used to shot down the F-18 is a BRDM-2 mounted 9K31 Strela-1 which uses either 9M31 or 9M31M IR missiles. The missiles seen flying after the F-18 aren't either of those models. (00:18:40)

Continuity mistake: The metal rod Burnett uses to stop himself from sliding down, while being shot at by the sniper, changes after he grabs it. (00:38:15)
Continuity mistake: In the scene where Serbian soldiers are searching for Owen Wilson's character almost all of them following the tank in that shot are left-handed. A few minutes later it happens again. In all other scenes most every soldier is right-handed. The odd shots are flipped. (00:40:10)