Corrected entry: Hudson Hawk is named as a "master thief" throughout the movie. It's interesting that during the first robbery (of the horse statue), he does not use any gloves or a mask. This movie is a comedy, but still...
Corrected entry: In the scene where Hudson Hawk is casing out the Museum to steal the book he is writing notes down with his left hand, but in the next shot you see Hawk's reflection in the mirror writing with his right.
Correction: As you said, it is a reflection. So, everything is correct here. Just stand sideways in front of a mirror and write something with your left hand, same effect.
Corrected entry: Minerva Mayflower says that gold and lead are 1 proton apart. Gold is element 79, lead is 82 - that's 3. (01:04:40)
Correction: Character error, not movie error.
Correction: He hardly ever gets seen or caught, but in an interview Bruce Willis said his character is a publicity hound, and likes the recognision. How would they know Hudson Hawk was a master thief if they didn't know it was Hudson Hawk?