When Number Five is approached by a Wolfram & Hart employee at the bar after his brothers' deaths, the business card shows that the employee is Holland Manners, but Manners would have been only 7 years old at the time of the brothers' deaths.
When Angel is on the phone with Fred, Angel's reflection is briefly visible in a window pane in front of him.
The business card that the Wolfram & Hart lawyer hands to Numero Cinco is incorrectly punctuated. It reads "Wolfram & Hart - Attorney's at Law".