It's a sequel to my Internet Explorer is Dangerous page: Web Browser Standards Support. It's a compilation of a bunch of web technology features and whether IE, Mozilla, and Opera support them or not. I basically just took the data from QuirksMode, fixed a couple errors, and removed some of the non-standard features. I'm sure there is a ton of them left, and not nearly all of the standards were listed, but I think it gives a good enough picture as it is (although fixing it up would certainly make Internet Explorer appear even worse).

I sure hope Internet Explorer gets a lot more greens in version 7. Veggies are good for you.