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[Bug 11960] Consider making the global scope pollution by names/ids quirks-only

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Date: Fri, 04 Mar 2011 17:37:43 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1PvYwh-0006hm-1r@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11960

Adrian Bateman [MSFT] <adrianba@microsoft.com> changed:

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                 CC|                            |travil@microsoft.com

--- Comment #8 from Adrian Bateman [MSFT] <adrianba@microsoft.com> 2011-03-04 17:37:42 UTC ---
We made some targeted changes in this area in IE9. Our data suggests that
making this quirks only would break a large number of web sites.

Prior to IE9, the "namespace resolvers" for window and document were the same.
In IE9 we added support for object elements to parse their fallback content
into the DOM. We discovered that it is common on the web for <object> to
contain <embed> with the same ID for both and for script to access these with
the property. The change we made was that so that the document namespace
resolver would only return the element that was "instantiated" with an
underlying control (so as not to break Flash injection scripts).

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