As Mitch (in Dave's body) goes to Dave's work for the first time, his jacket is buttoned up as he walks in but in the next shot after the man says "Early morning on the golf course, Lockwood?" his jacket is unbuttoned. Then when he goes in the room with all the food immediately after, his jacket is buttoned again.
What are the differences between the R-Rated and Unrated Version?
A
A sequence of three new scenes, which mostly cover Dave and Jamie's relationship and sex life, were added. Furthermore, three more scenes can be seen during the ending credits: They are smoking a joint in the car, are standing in front of an aquarium and are later watching the porn which was filmed at the beginning. The rest of the additions are not worth mentioning. A detailed comparison between both versions with pictures can be found here.
Q
What song is playing when Jamie walks out naked?
A
'Cherry Pie' by Warrant. The rest of the songs can be found here with scene descriptions.