"untrusted" 2.6.30-1 kernel for SheevaPlug?

[Rick Thomas <rbthomas55@pobox.com>]

On my Sheevaplug, trying to do "aptitude full-upgrade", I get:

> The following NEW packages will be installed:
>   linux-image-2.6.30-1-kirkwood{a}
> The following packages will be upgraded:
>   linux-image-2.6-kirkwood linux-image-kirkwood
> The following packages are SUGGESTED but will NOT be installed:
>   fdutils
> 2 packages upgraded, 1 newly installed, 0 to remove and 0 not  
> upgraded.
> Need to get 14.9MB of archives. After unpacking 42.7MB will be used.
> Do you want to continue? [Y/n/?]
> WARNING: untrusted versions of the following packages will be  
> installed!
>
> Untrusted packages could compromise your system's security.
> You should only proceed with the installation if you are certain that
> this is what you want to do.
>
>   linux-image-kirkwood linux-image-2.6-kirkwood linux-image-2.6.30-1- 
> kirkwood
>
> Do you want to ignore this warning and proceed anyway?
> To continue, enter "Yes"; to abort, enter "No": No
> Abort.


What's up?


Rick


PS: If it's any help, here's my sources.list file:

> deb http://ftp.us.debian.org/debian/ lenny main
> deb-src http://ftp.us.debian.org/debian/ lenny main
>
> deb http://security.debian.org/ lenny/updates main
> deb-src http://security.debian.org/ lenny/updates main
>
> deb http://volatile.debian.org/debian-volatile lenny/volatile main
> deb-src http://volatile.debian.org/debian-volatile lenny/volatile main
>
> # Orion repository
> deb http://people.debian.org/~tbm/orion lenny main