A Stryker ICV vehicle is quickly seen driving by in the background during the airport scene. This scene takes place in the movie well before the clip of George W. Bush's "Mission Accomplished" speech; which was on May 1st 2003. The Stryker, however, wasn't fielded until October/November 2003. This is at least 5 months after the Bush speech and well after the time period in which the airport scene took place.
Miller wears Casio G-Shock watch model number AWG-591MS-1A wristwatch (Which was later authenticated by Universal and won as a prize in a competition). This watch was first released in 2007 and clearly could not have existed in 2003-2004.
When Chief Miller catches up to Freddy after he runs away with the notebook, we can see his right knee guard has slipped down to his ankle but after a short cut away to Freddy it is back up to his knee again.
After President Bush is seen making the announcement on TV, a blonde woman in a green/blue shirt is seen stood up, clapping. In the very next shot, the same woman is seen sat down, talking excitedly to people at her table.
When Chief Miller and his MET team are about to raid the first site for WMDs they are seen wearing a DCU uniform (BDU styled uniform featuring 3-color desert camouflage pattern AKA 'coffee-stains pattern') just before they enter the building. Once inside the building, Miller and his team are all wearing Woodland Camouflage BDU uniform. When they come outside, they're again seen wearing DCU uniform.
Like most films situated in the Middle-East this movie was filmed in Morocco. The streets are filled with French cars that you would not find in Iraq and scenes of men in crowds wearing the Moroccan common dress.
When the Google results screen appears after Miller's search for information on Lawrie Dayne's WMD articles, all of the URLs are for www.twsj.com, except for one which is www.twsj.coml. This (coml) is not a valid top level domain, so the URL is not plausible in reality.
When Miller's team arrives at the bus station, Perry is wearing a baseball cap with an American flag on it. The flag is reversed (with the stars on the right side) like the flag patch worn on the right shoulder; hats should have the flag pointing the usual way (with the stars on the left side).
The goof items below may give away important plot points.
In the deleted scene where CW2 Miller informs Mrs. Hamza that her husband is dead, Mrs. Hamza is screaming at CW2 Miller with Freddy translating into English. At one point, she repeats the phrase "Wayn Abu Alatfahl?!?" which translates literally as "Where is the father of the children?!?", or, more loosely, "Where is the father of my children??". Freddy says in English, "You Americans have lost your honor!"
At the end of the film, CWO Miller sends an email to Wall Street Journal Writer Lawrie Dayne. In the email he writes "See attached". However, there is no visible attachment in the initial email, and when the scene cuts back to the computer screen there is a Document open and an attachment symbol within the email that was previously not there.