RESOLVED CONFIGURATION CHANGED 11543
Positioning of floats when before collapsing margins 
https://bugs.webkit.org/show_bug.cgi?id=11543
Summary Positioning of floats when before collapsing margins
Ian 'Hixie' Hickson
Reported 2006-11-07 16:09:13 PST
This test case renders incorrectly: http://www.hixie.ch/tests/adhoc/css/box/block/margin-collapse/067.html The float is in between two collapsing margins, so it should get a self-collapsing anonymous parent block and be aligned with the top border edge of that block. That block is between collapsing margins (obviously). The top border edge of that block is defined to be the same as the top border edge of the parent block (since the block's top margin collapses with the parent block's). The parent block's top border edge is defined to be what it would be if that block had a non-zero top border edge.
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mitz
Comment 1 2007-08-29 01:04:04 PDT
See also bug 15062.
mitz
Comment 2 2007-08-29 01:11:24 PDT
(In reply to comment #1) > See also bug 15062. Don't. See also bug 15105 instead.
Robert Hogan
Comment 3 2012-09-26 12:20:27 PDT
Looks like this hasn't really moved on from: http://lists.w3.org/Archives/Public/www-style/2007Sep/0048.html Everyone is broken per the spec, and it doesn't look as if the spec has changed.
Robert Hogan
Comment 4 2012-09-26 12:21:16 PDT
Didn't mean to mark invalid!
Ahmad Saleem
Comment 5 2022-07-24 04:40:30 PDT
All browsers match each other in the attached test case and show "red" (just contrary to expected result) and "green" square (red on top and green below). Since all browsers (Chrome Canary 106, Firefox Nightly 104 and Safari 15.6) match other, we can mark this as "RESOLVED CONFIGURATION CHANGED" or "RESOLVED INVALID"? Thanks!
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