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.

LOL. No I've not noticed that one but I'll look for it now.

Apart from the goofs listed on this site, the dog one is the first I've ever spotted.