Invalid Signature of breezy-updates

[Andreas Schildbach]

Hi all,

I frequently get the following error with breezy-updates. What's the 
problem with this repository? Is it maybe just the german mirror? It 
occured last week, then it was okay for some days, and now it appears again.

$ sudo apt-get update
[...]
Fetched 26.6kB in 11s (2370B/s)
Reading package lists... Done
W: GPG error: http://de.archive.ubuntu.com breezy-updates Release: The 
following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu 
Archive Automatic Signing Key <ftpmaster at ubuntu.com>
W: You may want to run apt-get update to correct these problems

Regards,

Andreas