I've been using Opus 5 since it was released and don't understand all the hate it gets. It very well could be something in my own local memories or Claude.MD files that prevents it, but I certainly have never experienced something like that site portrays.

That’s funny but I don’t really recognise that issue. I’m very confident that Opus 5 would correctly change the colour of just one button.

Nice, captured the flavour of 5's writing exactly.