During the scene in the ESB's basement, after Ann storms out and David comes to, the unconscious Michael (lying on the ground) disappears from where he's lying as David walks past that spot and reappears when David returns. The bucket earlier thrown at him by Ann does not disappear, although it changes position after every cut.
The morning after the restaurant, when David tries to tell Ann he is not really in the F.B.I., Ann's hands are on either side of David's neck. In the next shot, her hands are folded over each other at the back of his neck.
When David Wilson is having the 4 dots tattooed on the bottom of his foot, the tattoo artist asks if he also wants a tattoo of a hula girl saying he does good hula girls. The tattoo artist then shows David a tattoo of a hula girl on his own arm as an example. No tattooist would have been able to tattoo himself at that angle and do such a good job.
While in the elevator, Orenov says that there are three basements in the Empire State Building. In actual fact, there is only one. An operative such as Orenov would be acutely aware of the set-up of a building they are using to conduct an operation.