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List:       konq-bugs
Subject:    [Bug 252280] [CSS 2.1 Conformance] border-top 2.54cm is not
From:       Gérard Talbot  <browserbugs () gtalbot ! org>
Date:       2010-09-25 18:52:44
Message-ID: 20100925185244.729C067ADE () immanuel ! kde ! org
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https://bugs.kde.org/show_bug.cgi?id=252280





--- Comment #3 from Gérard Talbot <browserbugs gtalbot org>  2010-09-25 20:52:42 ---
> BTW, do you have a good intuition on how e.g. border-width: 4.5px; or such
> should work?

Maksim, there is no guidelines, no norm, no practical consensus (among
mainstream browsers) and no recommendation right now. All I heard (and now I
can not find where) is that this issue needs to be discussed and fixed (decided
consensually) in CSS 3.

Your question is very good though: the ".5" situation is the "edgiest" case to
be decided.

For 9.6px set as a border-width, Firefox 3.6 and Safari 4.0.4 round down the
value and use 9px but IE8 and Opera 10.10 round up to 10px.
http://lists.w3.org/Archives/Public/public-css-testsuite/2010Jan/0062.html

This issue of fractional pixel has affected all browsers, many properties
(border, padding, margin, width, height, line-height, font-size, etc) and has
affected at least 125 testcases of the CSS 2.1 test suite, probably more than
125 testcases.
Sometimes, it affects only Konqueror 4.4.5.

E.g.:
http://lists.w3.org/Archives/Public/public-css-testsuite/2010May/0021.html
and now, the newest version of padding-bottom-036.htm
http://test.csswg.org/suites/css2.1/20100917/html4/padding-bottom-036.htm
only (and still) affects Konqueror 4.x (and not Firefox 3.x or Safari 5.x).

regards, Gérard

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