Can't enable universe when installing Bindwood using client

Binary package hint: ubuntuone-client

In Ubuntu One Preferences there is the option to sync bookmarks. Below this it says "Firefox extension not installed". When I click "Install", it asked if I want to enable Universe. I did already have Universe enabled, but with a non-official mirror with the following line in my /etc/apt/sources.list:

deb ftp://ftp.wa.co.za/pub/ubuntuarchive/ lucid main restricted universe multiverse

I clicked OK and it reported that it could not enable Universe, and went back to the Preferences screen.

On trying again, it doesn't ask to enable Universe - instead asking me if I want to install package 'xul-ext-bindwood' which seems to be the correct behaviour.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: ubuntuone-client-gnome 1.1.91-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic i686
NonfreeKernelModules: wl
Architecture: i386
Date: Wed Apr 7 09:28:53 2010
ExecutablePath: /usr/bin/ubuntuone-preferences
InterpreterPath: /usr/bin/python2.6
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_ZA.UTF-8
SourcePackage: ubuntuone-client
UbuntuOneSyncdaemonConfig:
 [bandwidth_throttling]
 read_limit = 2097152
 write_limit = 2097152
 on = False