Plasma Networkmanager widget cannot connect to past wifi networks

I am using Kubuntu Oneiric, updated to the latest version. I use plasma-widget-networkmanagement to connect to wifi networks. If I have already connected to a network in the past, the system is unable to connect to it again. Clicking on a 'known' network silently fails without any error, and a red cross appears on the wifi symbol in taskbar.

To resole the issue, I need to go to "Manage Connections" -> "Wireless" -> and delete the entry for the wifi network I'm trying to connect to.

rohan@ubuntu:~$ lsb_release -rd
Description: Ubuntu oneiric (development branch)
Release: 11.10

rohan@ubuntu:~$ apt-cache policy plasma-widget-networkmanagement
plasma-widget-networkmanagement:
  Installed: 0.9~svngit.nm09.20110610.0c83d8-0ubuntu4
  Candidate: 0.9~svngit.nm09.20110610.0c83d8-0ubuntu4
  Version table:
 *** 0.9~svngit.nm09.20110610.0c83d8-0ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

Expectation: Past networks should work out of box.
What happens: Silently fails, without any error.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: plasma-widget-networkmanagement 0.9~svngit.nm09.20110610.0c83d8-0ubuntu4
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Mon Sep 26 15:36:36 2011
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: networkmanagement
UpgradeStatus: No upgrade log present (probably fresh install)