When Fawz and Tush visit the art gallery, there's a blue/green painting on the wall to the left of the door as they are leaving. This painting is replaced by the cop holding the pig when Randy and James visit the gallery.
When Franco's dad Reggie leaves the shop, he picks up a bottle of wine off a table and takes it with him. That same bottle is back on the table, next to Maya, when the owner of the art shop walks out.