Continuity mistake: When the woman almost overturns the shelves when Wes is signing his book, you can see that in the first shot, all the upstanding books are falling down. In the next shot some are upright, and then in the next they are all lying down again. (00:18:00)
Other mistake: When Wes is running from the bad guys he hides in a St Patrick's day parade. No buildings that they pass have any St Patrick's day decorations or give any hint of this holiday, including the Irish bar they go into earlier.
