A Night of Fright is No Delight - S1-E16
Corrected entry: When Scooby is in the bathtub, his collar tag has a blue diamond on it, but when we see him going down the chute, the diamond has gone.
Corrected entry: Where did the Ape Man get the Scooby mask?
What the Hex is Going On? - S1-E6
Corrected entry: How did the make-up hide the bad guy's glasses?
Corrected entry: When Shaggy takes a picture of the actor disguised as an ape, he takes him from the back. When he shows the picture to Velma, Freddy and Daphne, you can see his face.
Correction: The 'ape man' actually turns around as soon as shaggy lifts up his camera to take the picture. That's why it may seem like the 'ape man' was turned the other way.
Correction: Sometimes Scooby's dog tag does not show the blue diamond on it. Presumably, when the blue diamond is not on the tag, then it can be reasonably inferred the tag has been turned around to the backside, where there is no blue diamond, showing the gold-colored backside of the tag, instead.
Scott215