Continuity mistake: In the 1991 flashback, Jamie is already engaged to Paul and is shown with long hair. However, in the 'Cold Feet' episode, Jamie is shown with short hair. Since the 'Cold Feet' episode was set in February of '91 and the flashback from this episode was set in late March or April of '91, these two episodes don't match up.
Buona Sera, Mr. Campbell: Part 1 - S7-E6
Continuity mistake: When Amanda is tied up lying face down on the floor, the next moment cuts to her using broken glass to cut the ties to free herself and her hands get all bloodied in the process. Yet after she frees herself then grabs her coat, and runs out onto the porch, her hands are suddenly clean.
Continuity mistake: Everyone drops to the ground and ducks when they believe that they heard gunshots. The microwave beeps and Tommy says it's just his popcorn. When he takes the bag out it is white, but immediately afterward it is red. (00:13:20)