Fire extinguishers changing from having the entire canister painted in their identifying colour to all being painted red with colour coded labelling.
What's all that about? Surely the previous system makes identification less ambiguous, even if it's only by a few degrees, and considering we're talking about potentially saving lives surely every marginal gain is relevant?
Edit to add that a quick Google suggests that they're all now red as it makes them easier to see, and therefore find, in a dark/smoke filled room. I suppose that's on the basis of, on average, any extinguisher is better than no extinguisher as you'd still have to be able to see the wording and print colour of it's markings!