Corrected entry: When Stu is in the drug store getting Demerol, he has a blue shirt on. When he gets back in the mini van, he has on a pink shirt.
Corrected entry: At Alan's dad's funeral, when Alan takes a picture of himself in front of his dad's portrait with his camera phone, the phone's camera is facing away from him. This is corroborated further when he takes a picture later in the film with the same phone of Phil climbing down to the balcony of Chow's suite at Caesar's Palace. The phone's camera is now correctly facing towards Phil.