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Dolly's braces in Moonraker was the one which sold it to me.
The silver leg on c3po, after growing up with star wars and having nearly every fucking toy and poster as a child, all without a silver leg. (first silver leg was when I got the video box set around 1999)
Then it was the red rising sun headband being changed to a black lotus plant in karate kid
Lastly it was the 5th "Young one" from the TV show, which was popular as fuck and nobody ever mentioned the hidden character until recently.