[Ubuntu-BR] Erro no arquivo /var/lib/dpkg/available

[Fernando Paim]

Estou usando os repositórios padrão... (imagino) veja a lista abaixo:

# sources.list

deb http://br.archive.ubuntu.com/ubuntu/ dapper main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ dapper main restricted
deb http://br.archive.ubuntu.com/ubuntu/ dapper-updates main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ dapper-updates main restricted
deb http://br.archive.ubuntu.com/ubuntu/ dapper universe
deb-src http://br.archive.ubuntu.com/ubuntu/ dapper universe
deb http://br.archive.ubuntu.com/ubuntu/ dapper-backports main restricted universe multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ dapper-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu dapper-security main
deb-src http://security.ubuntu.com/ubuntu dapper-security main
deb http://security.ubuntu.com/ubuntu dapper-security universe
deb-src http://security.ubuntu.com/ubuntu dapper-security universe
deb http://packages.freecontrib.org/ubuntu/plf/ dapper free non-free
deb-src http://packages.freecontrib.org/ubuntu/plf/ dapper free non-free
deb http://packages.freecontrib.org/ubuntu/freecontrib/ dapper free non-free
deb-src http://packages.freecontrib.org/ubuntu/freecontrib/ dapper free non-free
~

Apaguei o arquivo /var/lib/dpkg/available mas o mesmo não gerado pelo apt-get update!!!

Meu sistema não faz atualizações e nem instalações! como resolver ?

Obrigado