The man who hands Bulworth a joint at the bar completely alters the direction he's facing and his visual expression in a split second as the shot changes.
When Bullworth arrives with the ribs in the bar, Compton, Murphy and the other assistant switch places between shots.
At 19:50 Super Fly and Blacula can be seen playing in a theater, but they were made in 1972 and this is a 1998 film. It is set to 1998 because the cordless phones being used in the film only came out in 1994.
Bulworth tells the assassin that he will be traveling to Los Angeles via American Airlines, yet the arrival airplane footage shown is clearly a Southwest Airline plane.
When Bulworth is ordering the hit, Vinnie's lips don't match his words.
When Nina is talking on a cell phone in Davers' garage, we hear a dial tone when the other party hangs up on her (cell phone networks don't use dial tones).
Crewmember visible twice when Bulworth is dancing with Nina in the nightclub.
When the "lightning" flashes in the opening sequence, you can clearly see the lights reflected in the marble floor