Continuity mistake: When Hitch is in college and meets a girl, he has his glasses on. From the angle behind they're off.
Continuity mistake: When Hitch takes a cab to see Allegra, in the close-up a man crossing the street from left to right suddenly appears.
Revealing mistake: After Ellis Island, when Hitch is closing the door on the taxi he got for Sara, his outer shirt is "pulled" into the cab just before the door closes and the cab pulls away, ripping his shirt off.
Continuity mistake: When Allegra Cole tries to set up a meeting with Albert, she tells him that she wants to get together later in the week. Then Hitch sets up a date for Sunday. Only after Hitch and Sara go on their Sunday date, Albert calls Allegra.
Continuity mistake: When Hitch and Albert meet for the first time, the sun changes between shots.
Answer: Adidas.