When Jesse is having dinner with Walt and Skyler, the fork in Jesse's hand changes position each time the camera angle changes from his left to his right or forward.
When Skylar is talking with Marie while holding Holly, the pink blanket location changes in between scenes.
When Walter used the coffee maker's power cord to burn through the tie-wrap holding his wrist to the radiator, the spike in amperage would have easily tripped the breaker on either the surge protector the power cord was plugged into or the breaker at the main electrical panel. He could not have used the stripped wires as an improvised arc welder to cut his bonds.
In the news cast when it is first revealed that Drew Sharp was the boy shot by Todd she says he has been missing since Thursday morning. However Lydia clearly states in the previous episode (S5,5; Deadfreight) that the train carrying the Methylamine comes every Wednesday. Which would be when the train was robbed and when Drew was ultimately killed. However, for any number of reasons, Drew's parents might only have realized he was missing the next day.