After George comes out of the bathroom and is talking to Izzie and Meredith, he is seen wearing gray sweatpants and black shoes. The camera shot then switches to Izzie and Meredith talking, and when it goes back to George storming away, he is still wearing the gray sweatpants, but he is now barefoot.
When Meredith is administering the shot of penicillin to George, it shows that she has no gloves on, then she does, and then she is gloveless again.
When George goes down to the lab to see his test results, the sign on the upper right says "HEMOTOLOGY LAB" which is spelled incorrectly. It should say "HEMATOLOGY LAB."
When Cristina states the cause of the death of the man on whom they performed the autopsy, she states that the cause was a condition known as "Hematomachrosis". However,the actual term for this condition is "Hemochromatosis".