After the front passenger side tire of Chuck's car is stolen, it's clearly back on the car in the next scene as it's being towed into the shop, only for a shop worker to roll it out from near the shop office in the next scene.
[At the rail platform] The same woman (long blonde hair, dark briefcase) can be seen getting on the train twice, once each from two different angles.
When Gary is at Michael's house, one of the cupboard doors goes from closed to opened between shots without being touched.
Marissa's German Shepard is obviously not a trained guide dog, as it doesn't stop when she comes to a curb.
When Gary knocks on Michael's door he knocks five times but there is only audio for four (the final knock is missing).
While Gary is talking with Michael about his health at the locker room, a boom mic can be seen over Gary's head.