Problema ao instalar aplicativos no ubuntu 10.04

railander
(usa Ubuntu)

Enviado em 14/01/2011 - 10:23h

Ao tentar instalar ao aplicativo no ubuntu 10.04 me surge o seguinte erro:

Código:
W: GPG error: http://ppa.launchpad.net lucid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B6C6326781C0BE11
W: Failed to fetch http://archive.canonical.com/dists/lucid/Release Unable to find expected entry partne/binary-amd64/Packages in Meta-index file (malformed Release file?)

E: Some index files failed to download, they have been ignored, or old ones used instead.


Alguem sabe como resolver? (sou iniciante).