When Perry is at the murder scene talking to Lt. Tragg, he's wearing a solid dark-colored tie. But in the next scene when he's talking with Karen Lewis just a few minutes later (he says he spoke with Tragg just a few minutes earlier), his tie is striped and more brightly colored.
Max Pompey injures his head in the first scene and applies a bandage. The bandage is gone in his next scene. In his third scene, the bandage is back. Update: His second scene is in a sauna, where it would be so moist that the bandage would probably not adhere properly.