Continuity mistake: In the scene where Michael has just taken Lucille number two to Tobias' new club, the shots are obviously taken on different occasions. The collar of his jacket goes from misaligned to correct, his hair goes from ruffed to "done" and the lighting goes from hard and sharp to soft.
Continuity mistake: When Tobias is talking to Michael about joining the Blue Man Group, he walks over to a bowl of fruit and rummages through it. The shot changes and he's rummaging through a bowl of nuts instead. (No time has passed. He's still speaking the same line).
Revealing mistake: When Michael is talking to George Michael, Oscar, Buster, and Tom Jane about the house they are about to build (and what they all want out of it), it is clear in the wide shots showing all five that Tom Jane is not present; the person standing in for him has a completely different haircut and wears glasses. They try to hide it but it is obvious at several points.