The One Where Joey Speaks French - S10-E13
Visible crew/equipment: After Rachel tells the others that her father had a heart attack and Ross takes two of Monica's cookies, when it cuts to the shot of Central Perk it's from a low angle, and the studio lighting rigs at the ceiling can be seen through the windows.
The One Where Joey Speaks French - S10-E13
Other mistake: When Chandler, Monica and Erika arrive back at the apartment after sightseeing, Chandler enters the apartment from the left (past where their apartment door is) rather than from the right, as if he came up the stairs. He obviously is entering from the stage and didn't take the time or cue to appear to enter from the direction of the stairs.
The One Where Joey Speaks French - S10-E13
Visible crew/equipment: When Joey is calling Phoebe after she walked out of his apartment, the shadow of a camera can be seen on Monica's door. (00:08:05)
The One Where Joey Speaks French - S10-E13
Continuity mistake: When Joey is drinking the milk the amount in the container changes. It sometimes grows. (00:22:00)
The One Where Joey Speaks French - S10-E13
Other mistake: When Joey auditions near the end and Phoebe steps in to explain to the producer/audition guy, she speaks French and the subtitles say, 'He is a little bit retarted' instead of 'He is a little bit retarded.' (00:18:35)
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.