At c. 43 minutes, as Thana puts a pink bag in the trunk of an unsuspecting stranger's parked car, we see a light yellow car parked closely in front. However, when the car is driven away immediately afterwards, the yellow car is several car-lengths away, leaving a sudden empty space.
When Thana pulls the gun on the man she met in the bar, she holds it close to his head, casting a shadow on his jacket. In the next shot, neither the gun nor the shadow can be seen. Returning to the longer shot, both are seen again.
Thana never appears to run out of bullets for her gun, and she frequently uses a full clip (around seven rounds) to kill her victims. Although we see Thana loading and re-loading a clip for her .45 caliber semi-automatic pistol, it is never explained where she got all the ammunition.
The goof item below may give away important plot points.
Crew or equipment visible
When Thana shoots The Photographer, right after the blood flies in from off-screen, the camera pans wildly and you can see a bearded crew member in a red shirt for a few frames before the camera whips back to The Photographer.