I'm just watching Murder - A self portrait and spotted a goof I've never noticed before.
In the scene at the very beginning where Columbo is at the dog show, he is shown putting the purple rosette on Dog while talking to another man. When the camera cuts back to Columbo as he describes how much love Dog has, the rosette magically appears back in Columbo's hands and then, just before he gets bit, it's back on Dog again.
Well, it's not earth shattering but it made me smile.
Rob, you ever notice in "Make Me A Perfect Murder", there's a scene where Kay visits her old, broken down house. Her and Columbo are at a table and she uses a candle to light her cigarette but she over-burnt it, it smokes and turns black and next time they show her, she has a fresh, non-burnt cigarette in her fingers.