Inconsistent lighting from shot to shot during the meeting between Captain Wolf and Chang. When the camera is facing Chang, he's shown to be backlit by the sun. In the reverse angles, with the camera on Wolf, Chang is, like Wolf, standing out of direct sunlight.
After Luke flips one of the tables in the restaurant, he shoots a Russian goon through the table. The table is obviously flexible which can be seen by the dent in the table as Luke pushes the gun against it.
The goof item below may give away important plot points.
When Luke is in the cab and (impersonating Piotor) calls Vassily to tell him he 'has the number', during the conversation Vassily calls him "Pioter" (correctly) and then incorrectly calls him "Igor"; the derogatory name they called Luke earlier in the film when they beat him up.