At 03:07 there is a piece of white tape on the barbers headphone wire. At 03:08 its gone.
At 04:14 there is a crease in the red curtain behind Undercover Brother's companion. At 04:27 its gone. At 04:56 its not there, but at 05:02 its back. Stopped watching it as it was driving me crazy.
At 02:20 Undercover Brother starts a hand shake with a man in a brown suit. The camera cuts away and when returning 2 seconds later his jacket has disappeared.
When the blonde Austrian hiker discovers Undercover Brother and his brother burried in the ice (16 years after the avalanche), you can see the 'ice' sheet bow under her weight.
The scene of Lionel walking into the barbershop and sitting in the chair there is no fist medallion. After it cuts away and comes back to him the medallion is around his neck right in the middle of him.
At 02:51 the crew are visible in Undercover Brother's glasses. At 03:03 they are gone.