Comment 5 for bug 347765

In Ubuntu 8.04 I have had a similar warning several times in the last couple of days.
I get notification that updates are available and click "check" then the following message appears.
Update manager still runs successfully.

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W: A error occurred during the signature verification.
The repository is not updated and the previous index files will be used.
GPG error: http://archive.ubuntu.com hardy-updates Release:
The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <email address hidden>

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/hardy-updates/Release

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