Dan Conner 18 December 2008 I like the sound of equivalent experience, and would love to read any of what Mr. Cartwright has said on that. I wonder who’s deciding what is equivalent. Some users will view the presence of a button, regardless of rounded corners or even color, as equivalent. If a company’s designers value a certain visual design / feel highly, and a large number of their customers are using IE 6, they’re less likely to appreciate developers coming to them with ideas of progressive enhancement. Is the idea of ‘progressive enhancement’ saying that designers shouldn’t care as much about the rounded corners on the button? That there are more important parts to care about when building a unique and beautiful experience on the website? Are we saying that a designer that wants rounded corners in IE 6 is viewing it wrong, or at least that they need to be enlightened to designing for the web?