Vanessa Warfield enters a room wearing a lab coat. It disappears in one shot when all the agents are looking at the map, then reappears during a wide shot.
When T-Bob trips and pulls the sheet off Switchblade, there are two subsequent shots of Scott and T-Bob during which the background remains the same.
When Buddy, disguised as Dagger slides down a grappling line from one building to the other, the building he is going to wobbles slightly.