After J.D. finds out that he was the one to have given Mr Bidwell Insulin, Turk walks in to the room wearing green slippers, but later in the same scene when J.D. runs out and Turk yells "Did Nurse Roberts give you these? They focus on his shoes which are now black/brown bowling shoes.
The exterior shot of the hospital at 1:11 is a different hospital with "Women's..." in the name.
When Elliot and Dr. Cox are talking in the break room for the second time, and Dr. Cox is talking about whiny interns coming to him for cookies and hugs, he mouths, "I swear to Allah" but the audio says, "I swear to Aisha." As this episode was probably filmed before the September 11th Attacks, the line was no doubt over-dubbed out of sensitivity to the political tensions of the time.
Within the first wide shot of after the opening credits, with J.D. and Elliot standing by a patient's bed at night, the boom is in shot at the very top of the frame, dipping in and out; the white gaff tape marking the microphone's windscreen comes into view.