Someone mentioned how 'good' Opera 8 was, so I decided to peek myself. It loads fast, has a smooth interface, but I needed to test it on CSS. So I open my evil non-hacked test page. For the most part, everything was expected. But I noticed (something I've apparently never noticed before): Opera doesn't render the body {margin: ..} selector right. For example, to have no margin, you have to apply the margin: 0; to the html tag. Now, I understand inheritance, but that's plain stupid.
I do so love Firefox :)