No package header when Upgrading Ubuntu

from terminal try this :-
$sudo rm /var/lib/apt/lists/* -vf

then update again :-
$sudo apt-get update

to apply upgrade :-
$sudo apt-get upgrade

this works for me when error to upgrade Ubuntu 11.04 to 11.10.

to restart :-
$sudo shutdown -r now

After restart, hmm...nothing happens (not upgraded to 11.10) ahaha...
then i Launch to update manage to continue my Upgrade.