Revealing mistake: During the bedroom scene with Felicity and Fat Bastard you can clearly see the air hose that fills his suit when he rolls over in the bed. (00:49:10)
Continuity mistake: After Connor has thrown the toilet off the roof onto one of the Russians and landed on the other, he is unconscious on the ground. While Murphy is collecting things from the ground and the Russians, Connor's legs switch from straight to crossed. (00:24:09)
Continuity mistake: During the scene when Thomas Crown is sailing, you can see the weather change from very dark and stormy, to just cloudy, to blue sky and sun, depending on the shot. (00:36:30)
Continuity mistake: In the scene when Gin and Mac are in the elevator, Mac puts in the keycard and presses 86. You then see the position indicator (PI) which shows the floor (70) in an LED, a red up arrow, and the words "EXECUTIVE FLOOR ACCESS GRANTED" in a red box. But when they are trying to escape, after Mac disengages the Door Hold button, you see that the PI has changed. It is all one colour and the floor number is written in a computer font. (01:22:15 - 01:28:45)
Continuity mistake: When Bill Lumbergh pulls into his parking space at Initech, the sign reads "Reserved for Bill Lumbergh, Division V.P." When Peter later pulls into the same space the sign only reads "Reserved for Bill Lumbergh." (00:02:50 - 00:41:05)
Other mistake: The death warrant for "Arlen Bitterbuck" is dated 1935 but the subtitle in German says 1985. (00:25:15)