update manager doesn't prompt for password, doesn't apply updates

Binary package hint: update-manager

I get the "updates" icon on the top panel. Right clicking and selecting "show updates" shows them. But pushing the install button doesn't prompt for authorization and doesn't apply patches. I do see "reading package lists" and a couple of other messages.

I'm using sudo apt-get update to apply patches.

Using the standard (left) click acts the same - no prompt for authorization.

ProblemType: Bug
Architecture: amd64
Date: Tue Dec 15 08:41:54 2009
DistroRelease: Ubuntu 10.04
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20091209)
NonfreeKernelModules: nvidia
Package: update-manager 1:0.131.2
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-8.12-generic
SourcePackage: update-manager
Tags: lucid
Uname: Linux 2.6.32-8-generic x86_64