Corrected entry: In the scene after Soo Young's father is shot, she tells Tucker and Chan that her father mailed her an envelope, and that if anything happened to him, she was to give it to them. Tucker and Chan go in an attempt to retrieve the envelope from the karate school that Soo Young teaches at, only to find out that some men had already taken it (presumably the bad guys). However, the entire purpose of the envelope is never mentioned again. It couldn't have been the 'Shi Shen' list because it was tattooed on Genvieve's head. She also states that the list is always secretly tattooed on a woman's head. This indicates that the mysterious envelope had no other purpose rather than to implement a fighting scene for Tucker.
Corrected entry: In the opening scene, when Carter is upset about the "1981 Cutlass Supreme" getting hit, the car shown (although briefly) is a 1980s model Monte Carlo. Notice the front end, longer hood, body lines, etc. The body style of an Olds Cutlass and Chevy Monte Carlo look similar, but they are in fact entirely different.