When i was upgrade from hoary to edgy, I was stuck, when level upgrade from breezy to dapper.

Errors were encountered while processing:
/var/cache/apt/archives/
lvm2_2.02.02-1ubuntu1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

so i was sudo apt-get remove lvm2, and then when i was to sudo dpkg --purge lvm2, i get an error “cant remove coz lvm2 wasn’t installed..n directory was empty..”,

So?
conclusion just change the repository back to breezy, then sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade
after finished the upgrade change the repository to dapper and then sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade
after that you should now what you’re doing.
cheers

gandalf@isengard:~$ lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 6.10
Release: 6.10
Codename: edgy