Setting the X-UA-Compatible response header has some aspects I find 
remarkable.

<meta http-equiv="X-UA-Compatible" content="IE=6">
  or
<meta http-equiv="X-UA-Compatible" content="IE=5">
...

- content="IE=5" or content="IE=6" throws IE8b1 in quirksmode, even if 
the document has a standards Doctype.

while
- content="IE=8" or content="IE=9" ... throws IE8 in Standards-IE8-Mode, 
even if there is /no/ doctype (or a quirksmode triggering doctype).

and
- content="IE=7" throws IE8 in Standards-IE7-Mode, even if there is /no/ 
doctype (or a quirksmode triggering doctype).


Other content like "IE=4" or "IE=nonsense" keeps IE8 in 
Standards-IE8-Mode if there is a standards doctype, so I think they are 
simply ignored.

But "IE=5" or "IE=6" are not ignored, they have a meaning that is not 
documented yet afaik.

So the meta-switch is able to take precedence over the doctype switch in 
any case.

Ingo

-- 
http://www.satzansatz.de/css.html
http://www.dolphinsback.com
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