That's a pretty good idea, Mannye. Along with the sugar break thing, some I've seen:
People getting confused with "aeration" and "degassing", wondering if they're the same thing.
"High pH" vs "High acidity" is another one that often gets people with less of a scientific background.
"Secondary". Some people seem to think there'll always be a secondary fermentation, rather than just shifting the mead to get it off lees etc.
It might be worth including some unit conversions too. 'Muricans use mostly imperial units whereas Europeans use metric. Also the discrepancy between US lquid gallons and imperial gallons might catch out anyone trying to convert a recipe to litres.