synaptic update manager error(s)

[susa]

synaptic package manager gives me the following errors:

http://wine.sourceforge.net/apt/source/Release.gpg
(something about unable to locate here...)

W: GPG error: http://security.ubuntu.com breezy-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: GPG error: http://archive.ubuntu.com breezy-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: GPG error: http://archive.ubuntu.com hoary-backports Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com


my sources.list looks like this:

deb cdrom:[Ubuntu 5.10 _Breezy Badger_ - Release i386 (20051012)]/ breezy main restricted

# Example sources.list for Ubuntu 5.10 "The Breezy Badger" release

## All officially supported packages, including security- and other updates
deb http://archive.ubuntu.com/ubuntu breezy main restricted
deb http://security.ubuntu.com/ubuntu breezy-security main restricted
deb http://archive.ubuntu.com/ubuntu breezy-updates main restricted

## The source pacakges
deb-src http://archive.ubuntu.com/ubuntu breezy main restricted
deb-src http://security.ubuntu.com/ubuntu breezy-security main restricted
deb-src http://archive.ubuntu.com/ubuntu breezy-updates main restricted

## All community supported packages, including security- and other updates
deb http://archive.ubuntu.com/ubuntu breezy universe multiverse
deb http://security.ubuntu.com/ubuntu breezy-security universe multiverse
deb http://archive.ubuntu.com/ubuntu breezy-updates universe multiverse

## The source pacakges
deb-src http://archive.ubuntu.com/ubuntu breezy universe multiverse
deb-src http://security.ubuntu.com/ubuntu breezy-security universe multiverse
deb-src http://archive.ubuntu.com/ubuntu breezy-updates universe multiverse

##Backports
deb http://archive.ubuntu.com/ubuntu hoary-backports main universe multiverse restricted

## PLF Repo's
#deb http://antesis.freecontrib.org/mirrors/ubuntu/plf/ breezy free non-free
#deb-src http://antesis.freecontrib.org/mirrors/ubuntu/plf/ breezy free non-free

##Wine Repo's
deb http://wine.sourceforge.net/apt binary/
deb-src http://wine.sourceforge.net/apt source/