When Max writes the location for Nick to exchange the scepter for the money, he doesn't give it to Nick. As Nick leaves, his hands are empty and we didn't see him put it in his pocket. A long shot of Max shows that the paper is no where in sight.
While casing the Customs House, Nick's GPS shows his location as W 33°26', N 29°32'. These Coordinates are are in the Eastern North Atlantic Ocean off the coast of Africa, 820 nm W of the island of La Palma. According to GoogleMaps, the actual Coordinates of the Montreal Customs House at 1010 rue de la Gauchetière Est Montréal, QC H3B 2N2, Canada are approximately 45.498391n, 73.567382w. Also, the coordinates given are only accurate to within a mile. This is hardly good enough to pinpoint Nick's location on a map.
The final bus station Jack runs to does not exist. The establishing shot before depicting a Montreal landmark facing the bus stop would place it in the middle of a popular tourist area opened only to pedestrians and cyclists in the old port of Montreal.
When Nick uses water from the fire sprinkler system to fill the safe, that should have triggered a water flow alarm. There is a detection switch that sounds an alarm if water begins flowing through the system (as this is typically caused by a sprinkler head discharging water to put out a fire), which would summon the Fire Department. In addition the water flowing out of the pipe should have been a dark brown color, not crystal clear as shown in the movie. The stagnant water in fire sprinkler systems always contains high amounts of rust, pipe oil, pipe sealant, and other sediment.
When Steven explains to Nick Wells how he hacked in to Ironclads secure server, he states that he got in at a "root COBOL level". COBOL is an obsolete mainframe programming language and has absolutely nothing to do with breaking into computer systems, and even less can you be at any form of "COBOL level" when visiting a remote computer.
The method used to blow the door off the safe by filling it
with water and then igniting a charge would have completely crushed the scepter and the metal box it was in. Besides, safes aren't watertight.
Nick uses a PVS-14 night vision monocular to see the IR beams while he is in the basement about to go into the cage containing the safe. However IR beams do not show up red, they show up white when using night vision devices.
When Jack and Burt are in the car on their way to pick up Nick from his underground reconnoiter, there is a lamp inside the car that is shining on Jack's face, and is turned off as the car approaches the camera.