*all* the browsers are a moving target. trying to support websockets in the dev channel of Chrome was practically the definition of 'moving target' last year ;-) It's just that it's OK to complain when IE makes a developer's life hard; complain about the other browsers and someone says you're a wimp. For extra points, explain to the average dev exactly what's in HTML5 on any given day &amp; tell them to hang out in IRC to find out how that's changed a week later...