Continuity: Initially, the cops are recording the signal from Paul's wire remotely, but they later end up retrieving a tape from him.
Errors in geography: There are no tollbooths on any roads or freeways in Seattle or the surrounding area.
Continuity: After Paul's bathroom incident at the party, the pieces of the tree limbs disappear and reappear between shots.
Continuity: When Ray is in Paul's apartment eating a sandwich, it varies inconsistently in size between shots.
Continuity: The sequence where Paul tries to escape from the bathroom is shortened, and a portion of it in which Paul removes his shoes is cut. However the following shots were not updated and thus, when Paul climbs back into the bathroom, his shoes are magically off of his feet and he's carrying them from his teeth.
Continuity: At the rehearsal dinner, when the Granny asks for wine from the chef, he is holding the carafe of juice in his right hand and the wine in his left. However, when the Granny insists on wine he pours from the carafe in his right hand which now contains the wine.
Continuity: When everyone rushes outside to investigate the car alarm, Becky is wearing her coat. All of the coats were earlier shown in the upstairs bedroom and she would not have had time to run upstairs and be outside the same time as everyone else.
Continuity: When Ray cracks an egg on Paul's head, from the front it's on Paul's right side from the back it's on his left.
Continuity: When Paul is chasing after Becky's taxi, the cars around Paul change between shots.
Continuity: In the record store, the back of Becky's hair keeps changing between having a single braid, to no braid.
Continuity: On the stairs, when Paul is introduced to Becky, the small tree branches keep appearing and disappearing.
Revealing mistakes: When Becky is looking for her panties in Paul's apartment, you can see through her grass skirt she's still wearing underwear.
Revealing mistakes: After returning from Ray's apartment, in one shot the mirror image of the car is used, with Paul driving from the right side seat.