[Mageia-webteam] [Bug 1664] [New] the html tag <hr> isn't well see

[mammig linux]

https://bugs.mageia.org/show_bug.cgi?id=1664

           Summary: the html tag <hr> isn't well see
           Product: Websites
           Version: trunk
          Platform: i586
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: www.mageia.org
        AssignedTo: mageia-webteam at mageia.org
        ReportedBy: mammig.linux at gmail.com


Description of problem:
It seems the CSS isn't well interpreted with some browsers.
For exemple, on this page : http://mageia.org/fr/1/
between "Et nous vous encourageons à  participer au projet, sur votre temps
libre ou à travers votre activité professionnelle." and "9 mois après le
lancement du projet, nous avons atteint :" you should have a <hr> ( a grey line
).
this <hr> can be see with Firefox and Opera, but not with Iceweasel / epiphany
/ Konqueror ( with those browsers i have a white space )

Version-Release number of selected component (if applicable):
the version of the browsers for my test : 
 Iceweasel/3.0.6 
 Opera/9.80 (X11; Linux i686; U; fr) Presto/2.7.62 Version/11.01 - revision
1190
 epiphany : Navigateur Web(browser) 2.22.3 - Propulsé(propulsed) par gecko-1.9
 Konqueror 3.5.9 using KDE 3.5.10
 Firefox 4.0.1

How reproducible:
I see <hr> on two pages : 
http://mageia.org/fr/contribute/
http://mageia.org/fr/1/

Steps to Reproduce:
go to those pages with different browser

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