Nick & Nora/Sid & Nancy - S2-E5
Continuity mistake: During dinner, when Jess takes the beer from the fridge he walks out the kitchen's back door which has a lattice wall on the porch, and when Lorelai opens the same door, in the next exterior shot she's walking out the side living room door, onto the porch. (00:26:20)
Nick & Nora/Sid & Nancy - S2-E5
Audio problem: When Lorelai is speaking to Luke about bringing Jess into Luke's home, her "the great communicator" line still has scratch audio attached.
Nick & Nora/Sid & Nancy - S2-E5
Continuity mistake: When Rory interviews Max, in each shot the pens on his desk in the cup keep rearranging.
Chosen answer: Lorelai and Christopher get married impulsively in Paris but they get divorced shortly after returning home. I don't know the exact number of days or weeks but they definitely weren't married for more than a couple of months.