The One With The Red Sweater - S8-E2
Continuity mistake: Monica is sitting in the living room with all her wedding presents, waiting for Chandler to return. She begins to open a large parcel and reveals a brown cardboard box. Then the camera moves to Joey, and when it moves back, the parcel is wrapped up again. This happens about three times. (00:05:05)
The One With The Red Sweater - S8-E2
Continuity mistake: When Monica asks, "What do you think it is?", regarding a present, it suddenly switches hand depending on the shot. (00:04:50)
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.