So...I was able to update...but when trying to upgrade

~ # apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
libgpg-error0 libpixman-1-0
The following packages will be upgraded:
nano
1 upgraded, 0 newly installed, 0 to remove and2 not upgraded.
Need to get 580kB of archives.
After this operation, 106kB of additional diskspace will be used.
Do you want to continue [Y/n]? y
WARNING: The following packages cannot be authenticated!
nano
Install these packages without verification [y/N]? y
Get:1 http://repo.pub.meego.com ./ nano 2.2.6-1 [580kB]
Fetched 580kB in 21s (27.1kB/s)
Aegis rejecting /var/cache/apt/archives/nano_2.2.6-1_armel.deb: package 'nano' already installed from 'com.nokia.maemo' -- not replacing it from unknown origin
aegis aborting dpkg -- all listed package files rejected
Compilation failed in require.
Updating desktop entries... Done
E: Sub-process /usr/bin/dpkg returned an errorcode (255)
~ #


If nano was already installed and up-to-date, why did it detect a upgrade..?