Character mistake: When Charlie is calling out the brick count to Napster from the subway, he describes it as being "13 across, 4 high, 4 deep". The bricks appear to be 2 deep in the safe (13x4x2), so he could just be lumping two shelves together, which works (13x4x4 = 13x4x2x2). The problem is that when the camera pans down there are 3 shelves in the safe. This means that there are more than the 208 bricks that Napster announces. (01:33:40)
Character mistake: When the helicopter's pilot says "Zorro-Mike" it should be "Zulu-Mike" (01:20:15)
Answer: They are flying the Italian Civil Ensign, which is used by civilians on water. The emblem in the center of the Italian flag when used on water are the Arms Of Savoy, the former royal Family of Italy.