Continuity mistake: After Solo puts the bracelet he lifted from the Contessa on Victoria's wrist, he reveals to her the "Etruscan" gold chain necklace which, according to the flashback, he lifted when he "fell" against her. The actual scene, however, shows her wearing the necklace as she walks away.
Continuity mistake: When Solo first bumps into Waverly at the party, he looks over his left shoulder as he says, "I beg your pardon." Later, when they are introduced, the flashback has him looking over his right shoulder.