In the chase scene with the Baltimore PD, the left front tire of the police cruiser is shot causing it to go flat and the cruiser to crash into a movie theater box office. As the cruiser slams into the box office, the tire has miraculously been re-inflated.
At the Bengie's Drive-In, Cecil pushes the film groupie out of the room and shuts the door after him. In the next shot, he is still there, and in the shot after he is gone.
A moment before Cecil licks the movie camera, the word "Panavision" can clearly be seen above the "Panaflex" logo that he licks. When it cuts to the close-up of him licking the "Panaflex" logo, the "Panavision" logo is covered with a blank plate that matches the color of the camera. In the next clear shot of the camera, the "Panavision" logo is back and the "Panaflex" logo is covered in black.
In the scene where the crew take over Forrest Gump 2, a hand grenade is thrown. The explosion occurs prematurely, before the grenade leaves view.
You can see Melanie Griffith's real hair coming out from under the blonde wig in the scene where her roots are getting treated (the same scene where the whole crew learns of the Forest Gump sequel).
When they set Honey's hair on fire when atop of the building at the drive in theater, she's obviously wearing a badly-disguised wig/prosthetic in the wide shots.
When raiding the Gump sequel production two PA's are attacked and one is holding a tray of coffee. It is obvious by the way the cups fall and there is no splash that the cups are actually empty.
In an early scene before Honey is escorted to the premiere, Ricki Lake's character says "We'll be right with you," but her lips don't move.
After the Sproket Holes kidnap Honey, they leave the Senator Theatre, make a left in the next shot, then pass a Wendy's restaurant. That Wendy's is located on York Road in Govans, south of the Senator. They would not need to have turned. The two shots (the turn and the Wendy's) should have been reversed.