You've Got a Girlfriend - S5-E10
Factual error: Mom and Pop refer to their basement. There are no basements in Florida. The only basements are usually houses that were built higher than normal that allow for a crawlspace above ground but under the house.
Mo' Chinese Mo' Problems - S5-E5
Continuity mistake: At one point you can see Marvin's red Jaguar parked in the driveway. He sold this car in the first episode of this season.