I'm also experiencing this issue today after I updated my box using Update Manager. It was not up to date (+30 days)
$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 10.04.1 LTS Release: 10.04 Codename: lucid
$uname -a Linux xxxxxx 2.6.32-24-generic #41-Ubuntu SMP Thu Aug 19 01:38:40 UTC 2010 x86_64 GNU/Linux
I'm also experiencing this issue today after I updated my box using Update Manager. It was not up to date (+30 days)
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.04.1 LTS
Release: 10.04
Codename: lucid
$uname -a
Linux xxxxxx 2.6.32-24-generic #41-Ubuntu SMP Thu Aug 19 01:38:40 UTC 2010 x86_64 GNU/Linux