When Renzo walks to Megan's table to tell her about his "special talent" he is wearing his suit coat. The scene then cuts to the group watching him walk over. When it cuts back to Renzo he is not wearing his suit coat.
At 54:57 the group from table 19 go out for a walk. The doors are open, they walk out and the doors stay open. In the next shot you can see the doors are closed again.
After Teddy has his encounter with the wedding cake, he takes off his jacket and starts to leave the room. When he does, the third button down on his tuxedo shirt is undone. A few seconds later as he is walking out to leave, he turns and the button is now buttoned properly, yet Teddy never took the time to button it back up.
When Eloise is talking to Teddy, alone in their first argument about him being "a ridiculous father" (as he interpreted her point of view which caused the break-up), he has a string of his hair hanging on this forehead. Every so often there is another take where he doesn't have it hanging on his forehead, after they switch back and forth from Eloise, back to Teddy.
When they are smoking marijuana in the aunt's hotel room, a man appears to be sitting outside of the window a couple of times, then he disappears and then reappears again.
When Nanny Jo returns to the hall to call on others to search for Huck, she looks straight front of herself while the group are on her right.