These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Mr. Slate is frequently presented as an expy of Mr. Spacely, but there's plenty of evidence that he's simply a no-nonsense but well-meaning employer. On at least one occasion, when an accounting error led to Fred not getting a bonus, he came to Fred's house in person to apologize.
"Funny Aneurysm" Moment: The infamous cigarette ad becomes this when you realise that Jean Vanderpyl, (Wilma's original voice actress) died of lung cancer in 1999. The commercial even shows Fred lighting up a cigarette for Wilma, before lighting one up himself.
The show and its live-action movies were very popular in Quebec.
The cartoon's localized version was also a major hit in Hungary, as the entire dialog had been rendered in witty rhymes by a famous poet. Due to the dub's success, some later dubs of cartoons and comedy movies used the same tactic. The show's later seasons and the spin-offs aren't that well known, though.
There are also quite a few jokes sprinkled throughout the series that would, today, be seen as sexist or misogynistic.
What Do You Mean, It's Not for Kids?: The series was a primetime sitcom that was never geared towards only children, as most of the situations and jokes were way over the heads of most kids at the time (and now). Later merchandise and spinoffs decided to go against that mindset, however.