First impressions of Firefox 3.0

I've recently run an update of my web browser to Firefox 3.0 and I must say, superficially I can't see too many differences. Some of the interface elements have increased in size. Although I suspect many of the improvements are under the hood in terms of rendering and new standards support. However I have experienced numerous severe crashes, particularly on some sites and incompatibility issues with some rich text editors which has seen me go back to Internet Explorer.