Strange things are afoot in IE-land. Remember our old friends quirks mode and (almost) standards-compliance mode? There's reason to believe IE8 will introduce yet another rendering mode, and that developers will need to opt-in to this rendering mode if they want IE to break backwards compatibility with its long-entrenched bugs. The question is, how will the opt-in be triggered? A <meta> tag? A version number in the opening <html> tag? An HTTP response header? A conditional comment? The mind boggles.
[Update]: Chris Wilson of the IE team promises more details soon regarding this very thing.
[Update jan/25/08]: And we have a winner: A <meta> tag and/or an HTTP response header. I have no opinion. Too many people smarter than I have already weighed in, and it remains to be seen just exactly how this will all shake out.
