In No Man's Land (2005), Liz Fallon's diagnosis is pancreatic cancer, however during Meredith's unconscious state when she is encountering all the people who have died, Liz asks her if she remembers her and Meredith incorrectly states that she had liver cancer.
When Derek visits Meredith in her hospital room, she is hooked to two parallel wires, one red and one white. In one shot, the white wire is on the left, but in the next it is crossed over the red one. In the very last shot of the scene, both wires are gone.
When Christina goes shopping, signs at the store all say "$1" and even the plastic grocery bags say "$1" (seen when at the bar, showing off her "crap" to Joe), though she keeps saying she bought everything for 99 cents.
During Meredith's resuscitation, an endotracheal tube is shown extending what appears to be six to eight inches past her lips. This would be incorrect placement in an adult; the end of the tube should be only one to two inches past her lips.