Edgy Upgrade Error

[Dan P]

Hello,

When I try to upgrade from Dapper to edgy using gksu "update-manager -c" 
I get the error: 
http://us.archive.ubuntu.com/ubuntu/dists/dapper-updates/universe/binary-i386/Packages.gz: 
Sub-process gzip returned an error code (1)

Any idea what the problem is?

Here is my /etc/apt/sources.list
---------------------
deb cdrom:[Ubuntu 6.10 _Edgy Eft_ - Release i386 (20061025)]/ edgy main 
restricted
 deb-src http://us.archive.ubuntu.com/ubuntu/ dapper main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ dapper-updates main restricted 
universe multiverse
 deb-src http://us.archive.ubuntu.com/ubuntu/ dapper-updates main restricted

## Uncomment the following two lines to add software from the 'universe'
## repository.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://archive.ubuntu.com/ubuntu/ dapper universe main restricted 
multiverse
 deb-src http://us.archive.ubuntu.com/ubuntu/ dapper universe

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ dapper-backports main 
restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ dapper-backports main 
restricted universe multiverse

deb http://security.ubuntu.com/ubuntu dapper-security main restricted
# deb-src http://security.ubuntu.com/ubuntu dapper-security main restricted
deb http://security.ubuntu.com/ubuntu dapper-security universe
# deb-src http://security.ubuntu.com/ubuntu dapper-security universe


Thanks,
Dan P