I'm currently running Ubuntu 5.10, and recently tried to update to dapper.
After the upgrade dialogue started, I was entually met with this error.
"Failed to fetch http://archive.ubuntu.com/ubuntu/dis...86/Packages.gz
Sub-process gzip returned an error code (1)"
Come to mention it, I've had difficulty connecting to the universe/multi-verse repositories. I think that it might be a problem with my sources.list file. If someone could post a copy of completely enabled sources.list file, I can see if that solves the problem. If not, we can trouble shoot from there.