At the dam scene, when Michael notices the different colored bolts in the wall, they are in the middle of a solid panel. As he examines the panel, the shot changes and a seam appears under the bolts (which becomes a door that Michael opens).
When Michael and Frank are fighting on Cara's balcony and Michael calls for K.I.T.T.'s help, K.I.T.T. drives towards the building to assist. During this maneuver the driver's side roof is open with the whole panel removed. In the next shot looking down from the balcony, the panel is in place and the roof is entirely intact and closed. Then the following shot, when Michael jumps, the roof is open again.
When K.I.T.T. opens the roller shutter of the art studio, the shutter is made up of wide, flat, white colored segments. When it gets closed it has suddenly become bare metal, with narrower, rounded sections. Then when K.I.T.T. reverses through the closed shutter, it is no longer a functional roller shutter at all, but horizontal slats fixed to a rigid, static frame.
With the injuries that Michael had, he certainly would not go galloping off up the road when KITT was chasing him, and then go leaping over barriers.
As Michael is familiarizing himself with KITT's performance he executes a high speed handbrake turn. Skid marks from previous takes can clearly be seen on the road.
K.I.T.T. mentions that he is using infrared to scan the dam. Infrared is passive scanning and therefore cannot penetrate walls, so it would be useless to try to scan inside an object.
When KITT is following Michael through the alley the camera moves to view KITT from the top. Although KITT is in driverless mode, the hands of a driver can be seen steering through the translucent roof panel.
Devon infers that Michael has regained his memory because he mentions 'Swamp Fox', who was first mentioned before he lost his memory at the start. However, Michael says that Swamp Fox was his childhood hero, and therefore, since only his recent memory was gone, Michael would have remembered his hero irrespective of whether he had this amnesia or not.