In the scene where Lance and Sontee are eating hot dogs, Sontee puts the hot dog in her mouth, then when the camera angle changes, she's bringing a whole hot dog to her mouth.
During Wellington's speech to the board members, the glasses of the board member directly to his right jump back and forth between his hands and the table depending on the camera angle.
When Lance/Wellington gets on stage at his own club, he takes the microphone off its stand and the cord disconnects. When the camera cuts back to him, the mic is plugged back in. His volume remains constant throughout.
When Wellington catches his wife and assistant on the pool table, the gold billiard ball over his wife's shoulder moves from the corner pocket, off to the side, and then back to the corner pocket.
At the beginning of the day that Sontee and Wellington have their first date, her hair is parted on the right. When she is kneeling down after he gets knocked out, her hair is parted on the left. Later that evening, in front of her apartment, her hair is parted on the right again.
Towards the end of the film Lance/Joe Guy puts a CD in the car stereo and the song "Gin and Juice" starts up in the middle of the song and not from the beginning as it should.
at @ the 60 minute mark when Charles/Lance are performing in the Wellington club there are a couple of occasions where the sound of clapping can be heard when nobody is clapping.
The hospital is supposed to be in Brooklyn, but when we look across the river to Manhattan we see the Queensboro bridge and the UN which both would mean the filmed it in Queens, not Brooklyn.
While traveling to Harlem, Wellington's limo is shown going through Times Square. Both 7th Avenue and Broadway are southbound streets, however Harlem is in the northeast corner of Manhattan.
At the very end of the film, in the overhead shot of Chris Rock driving away through nighttime traffic, he goes through an intersection where a driver (waiting to turn left after Chris passes) flashes his headlights at him, because his headlights are not turned on.