Continuity mistake: S6-E02. When Zach Braff is talking to his girlfriend about whether or not they'll keep their baby, he says something like "I sure do," and is propping up his head with a hand. In the next shot (which continues his line of dialogue) he is suddenly no longer propping up his head.
Continuity mistake: When Turk goes into the room with the camcorder on the tripod, the viewer is already open from the front. However when it goes into the back shot of Turk to show Carla, the viewer is shut again. Then it goes to the front view of Turk and the camcorder, it's open again without anyone touching it.