squeeze backports is broken too: Hit http://backports.debian.org squeeze-backports/main i386 Packages Fetched 836 B in 1s (773 B/s) Reading package lists... Done W: GPG error: http://backports.debian.org squeeze-backports Release: The following signatures were invalid: BADSIG 9AA38DCD55BE302B Debian Archive Automatic Signing Key (5.0/lenny) <ftpmaster@debian.org> Regards Uwe