signature invalid: BADSIG 010908312D230C5F Debian Archive Automatic Signing Key (2006)

[Rick Thomas <rbthomas55@pobox.com>]

Does anybody know why I'm getting this message when I do "aptitude  
update"

> W: GPG error: http://mirrors.usc.edu etch Release: The following  
> signatures were invalid: BADSIG 010908312D230C5F Debian Archive  
> Automatic Signing Key (2006) <ftpmaster@debian.org>

A couple of days ago, I was getting the same message, but from  
debian.lcs.mit.edu, instead of mirrors.usc.edu.  Both sites are in my  
sources.list file.

Thanks!

Rick