When the waiter serves Stenwick champagne at the end of the film, the amount of champagne in her glass increases between shots, gradually disappearing, while Ray's foam disappears almost instantly.
In the beginning of the movie, the captioning says they are at the US Consulate in Dubai, but they are actually at the One & Only Ocean Club Resort on Paradise Island in the Bahamas. The consulate in Dubai is a skyscraper, not the villa we see.
When Koval and Stenwick get together with the rest of their team to celebrate after accomplishing their mission, the bottles of Stella Artois beer on the center table change position between different shots.
Ray Koval: [referring to the thong Claire found in his wardrobe]
I've been loyal to you. The only woman who's been in this apartment is the landlady and she couldn't wear that thing as a wristband.
In the end Claire and Ray discovered they were used by Howard Tully so that he could humiliate his rival company, Equikrom. Unbeknownst to all, Pam (Kathleen Chalfant) was a mole for Burkett & Randle (shown at 1:49:32) and she probably found out that Claire and Ray were together and were planning a big con in the future. Using this knowledge, Howard Tully (Tom Wilkinson) created a story about a revolutionary product (which doesn't exist) in order to entice Claire into believing that this would be the product she and Ray were going to steal. With the trap set, Pam and an agent inside B&R (Thomas McCarthy) planted evidence suggesting that B&R was creating a product in Ohio, hired Ronny Plaitz as bait and staged a break in all so Claire and Ray could steal the information and give it Equikrom's C.E.O., so that he could announce it at the shareholders' meeting and be destroyed.
Q
Why does Garsik use a double?
A
Garsik has a double so that he can avoid being followed when he goes to the industrial espionage headquarters where they are spying on Tully's company. He assumes that people from the other company are spying on him, too, and the double is to throw the spies off track.
Q
A Note Regarding Spoilers
A
The following FAQ entries may contain spoilers. Only the biggest ones (if any) will be covered with spoiler tags. Spoiler tags have been used sparingly in order to make the page more readable.