Continuity mistake: When Cory first confronts Shawn over kissing Topanga in their dorm room, Shawn is looking through his drawer for a shirt. The shot goes to Cory for a second, then when it goes back to Shawn he's had time to find a shirt and put it on - the shot wasn't off him for nearly enough time to do that.
Continuity mistake: In every other episode where Shawn's trailer is shown, next to the kitchen there was always sort of a hallway leading to bedrooms/bathrooms. When Shawn and Jack are in the trailer in this episode, there is one big wall.