HTML 5 Doctype causing quirksmode?

Does using an HTML 5 Doctype cause Quirks mode in modern browsers, since HTML5 isn't out yet?

(That is Modern Browsers were out before HMTL5 star开发者_开发百科ted spreading, so they don't properly support it.)

If yes, does this mean that the HTML 5 Doctype is tentatively like none at all?

EDIT: If not, what does it do in browsers that don't support and the like?

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No it doesn't, see this article.

What's nice about this new DOCTYPE, especially, is that all current browsers (IE, FF, Opera, Safari) will look at it and switch the content into standards mode - even though they don't implement HTML5. This means that you could start writing your web pages using HTML5 today and have them last for a very, very, long time.

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According to Wikipedia table (that I love) HTML 5 DOCTYPE triggers full standard mode for:

FF, Chrome, Opera 7.5+, Safari, Konqeror 3.5+ and also IE8!!!

and triggers Almost standard mode [*] for:

IE6 and IE7

So it's definitely the best DOCTYPE ever created!

"One DOCTYPE to bring them all and in the darkness bind them..." [Lords of the rings]

[*] "Almost standards" does NOT make such a big difference to full standard mode, in the same Wikipedia link above you can find more details.

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No it does not.