On 2009-07-10 15:03 +0200, Zachary Uram wrote: > How do I fix this error, when I run 'apt-get update' it says suddenly: > > W: GPG error: http://debian.mirrors.pair.com squeeze Release: The > following signatures were invalid: > KEYEXPIRED 1246455239 Use a different mirror, debian.mirrors.pair.com has apparently not been updated for months. Sven