When Kitty and Joan find the door that can be opened with the mystery key on Jessica's key chain, the door opens inwards, with hinges on the left and the lock on the right. Immediately after that scene, they walk in a hallway with that door behind them, but the hinges and lock are the wrong way around.
Joan accuses the defense attorney of hiding evidence that should have been turned over in discovery. But only the prosecution is required to turn over a discovery package to the defense.
When Holmes takes the pictures of Kitty as a fake corpse, her complexion is much too pink, as in a normal, live Caucasian. A corpse that has lost a lot of blood, like they are trying to fake with the "slit throat", has a sickly gray pallor.
Holmes says Watson can't have a "quote-unquote" traditional relationship. But someone as unconventional & literal as Holmes either would have simply said "quote" (allowing the unquote to be understood as it still must be when saying it the way he did), or he would have said it correctly as "quote traditional unquote".