cannot get past Time Zone stage of install

[RG]

Binary package hint: gnome-panel

I cannot proceed with Ubuntu installation after selecting language
and time zone information -- the window size makes it impossible
for me to do anything. Screen resolution selections are only
limited to 800x600 and 600x400 (or something similar); and there
are no slide-bars to navigate in the window. Please tell me how to
fix this. It should not be this hard to get started!

RG

ProblemType: Bug
Architecture: i386
Date: Fri Sep 28 03:33:37 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/gnome-panel
Package: gnome-panel 1:2.18.1-0ubuntu3
PackageArchitecture: i386
ProcCmdline: gnome-panel --sm-client-id default1
ProcCwd: /home/ubuntu
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-panel
Uname: Linux ubuntu 2.6.20-15-generic #2 SMP Sun Apr 15 07:36:31 UTC 2007 i686 GNU/Linux