Over the next few days, many of you will see these on apt-get updates
W: GPG error: ftp://ftp.us.debian.org sid Release: The following signatures were invalid: BADSIG AED4B06F473041FA Debian Archive Automatic Signing Key (6.0/squeeze) <ftpmaster@debian.org>
These are normal during the transitions from Testing to Stable unfreezing...
There is a whole lot shakin in the debian repo world right now, just be patient and they all will resolve themselves
Its nice to see that wheezy has finally thawed.
When this transition is over I expect that we will see a noticeable increase in the "unstable" packages.