Installation got stuck with exception: <urlopen error [Errno -2] Name or service not known>

[Erik B. Andersen]

Binary package hint: ubiquity

I started the maverick daily image from a liveUSB created with the Lucid usb creator. When the install ubuntu or run ubuntu screen came up, I choose Try it out or something like that. Then I later opened the installer from the desktop icon. I started the install and used manual partitioning. Eventually the installer said it was 'downloading file 4 of 6' but stopped moving (I left it all night). When I looked in the terminal part of the installer, exception: <urlopen error [Errno -2] Name or service not known>. When I clicked skip to get past that file, the installer did nothing.
Normally, I would expect the installer to successfully skip a file if the download failed, and automatically skip downloading a file if it failed to download after a few tries.

lsb_release -rd&&apt-cache policy ubiquity
Description: Ubuntu maverick (development branch)
Release: 10.10
ubiquity:
  Installed: 2.3.16
  Candidate: 2.3.16
  Version table:
 *** 2.3.16 0
        500 http://archive.ubuntu.com/ubuntu/ maverick/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: ubiquity 2.3.16
ProcVersionSignature: Ubuntu 2.6.35-19.28-generic 2.6.35.3
Uname: Linux 2.6.35-19-generic x86_64
Architecture: amd64
Date: Tue Sep 7 08:14:43 2010
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
LiveMediaBuild: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100906)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity