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.
Crowning Moment of Funny: The famous outtake from the UK version of Fred Harris acting like The Prima Donna and screaming "Amateurs! I'm expected to work with amateurs!" ... at Big Ted the teddy bear, who was refusing to sit properly without falling down.
They Changed It, Now It Sucks: Until 1999, the format remained basically the same with 3 windows, 2 different clocks (each with their own theme music) and 2 presenters who, for the majority of the time, would act like they were playing with you, and no-one else. Since 1999, the format has been changed to reflect a more modernized Australia, with both the clocks and three windows option put in storage, and replaced with more computerised equivalents. (The Windows rotating prop that was mentioned at the top was briefly replaced by an animation that showed what Window would be the one that they would be going through.
When the UK version was cancelled, it was replaced with a very similar show called Playbus. Not similar enough for some parents, though.
The Scrappy: Hamble in the UK version was hated by both the presenters and the general public. It got to the point where she was even being kicked across the room by disgruntled cast members, which might explain why the Australian version (who had her on loan from the UK) had to retire her some 15 years ago - seeing as she was "beyond repair".
Too Soon: One episode had the team using building blocks then knocking them down...on September 12, 2001. This was the first time the show received hate mail from upset parents.
For the record, the attacks started at 11:46pm on September 11 in East Australian(Canberra) time, nearing midnight, while the show (which is recorded months in advance) goes out at fixed times in both the morning and afternoon.