Probleme internet sous debian

Bonjour à tous ! j’ai un problème depuis une mise à jour sous debian, version cid lenny. J’arrive à me connecter à internet mais quelques site ne fonctionne pas, en outre l’affichage graphique de certains n’est pas normal. Voici mon source list
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lenny

deb ftp.fr.debian.org/debian/ lenny main contrib non-free
deb-src ftp.fr.debian.org/debian/ lenny main contrib non-free

lenny multimedia

deb mirror.home-dn.net/debian-multimedia lenny main
deb-src mirror.home-dn.net/debian-multimedia lenny main

lenny security

deb security.debian.org/ lenny/updates main contrib non-free
deb-src security.debian.org/ lenny/updates main contrib non-free

volatile

deb volatile.debian.org/debian-volatile lenny/volatile main contrib non-free
deb-src volatile.debian.org/debian-volatile lenny/volatile main contrib non-free

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squeeze

deb ftp.fr.debian.org/debian/ squeeze main contrib non-free
deb-src ftp.fr.debian.org/debian/ squeeze main contrib non-free

squeeze multimedia

deb mirror.home-dn.net/debian-multimedia squeeze main
deb-src mirror.home-dn.net/debian-multimedia squeeze main

squeeze security

deb security.debian.org/ squeeze/updates main contrib non-free
deb-src security.debian.org/ squeeze/updates main contrib non-free

################################################

sid

deb ftp.fr.debian.org/debian/ sid main contrib non-free
deb-src ftp.fr.debian.org/debian/ sid main contrib non-free

sid multimedia

deb mirror.home-dn.net/debian-multimedia sid main
deb-src mirror.home-dn.net/debian-multimedia sid main

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experimental

deb ftp.fr.debian.org/debian/ experimental main contrib non-free
deb-src ftp.fr.debian.org/debian/ experimental main contrib non-free

experimental multimedia

deb mirror.home-dn.net/debian-multimedia experimental main
deb-src mirror.home-dn.net/debian-multimedia experimental main

et mes preferences
Package: *
Pin: release o=apt-build
Pin-Priority: 989

Package: *
Pin: release o=Unofficial Multimedia Packages,a=unstable,l=Unofficial Multimedia Packages
Pin-Priority: 988

Package: *
Pin: release o=Debian,a=unstable,l=Debian
Pin-Priority: 987

Package: *
Pin: release o=volatile.debian.org,a=stable,l=debian-volatile
Pin-Priority: 986

Package: *
Pin: release o=Debian,a=stable,l=Debian-Security
Pin-Priority: 985

Package: *
Pin: release o=Unofficial Multimedia Packages,a=stable,l=Unofficial Multimedia Packages
Pin-Priority: 984

Package: *
Pin: release o=Debian,a=stable,l=Debian
Pin-Priority: 983

Package: *
Pin: release o=Debian,a=testing,l=Debian-Security
Pin-Priority: 982

Package: *
Pin: release o=Unofficial Multimedia Packages,a=testing,l=Unofficial Multimedia Packages
Pin-Priority: 981

Package: *
Pin: release o=Debian,a=testing,l=Debian
Pin-Priority: 980

Package: *
Pin: release o=Unofficial Multimedia Packages,a=experimental,l=Unofficial Multimedia Packages
Pin-Priority: 99

Package: *
Pin: release o=Debian,a=experimental,l=Debian
Pin-Priority: 98
J’ai peut etre une erreur dans ses sources. Merci de votre aide.

tu postes dans la mauvaise section, je bascule dans “Support Debian”