knetworkmanager disconnects and will not reconnect until after reboot

On one of my wireless networks, knetworkmanager will occasionally disconnect. When it tries to reconnect it displays the network secrets dialog and will not reconnect until I reboot the machine. The problem also happens if I put the machine to sleep and wakeup.

Also, plasma becomes very unresponsive after this event making it hard to logout. I did eventually get it to log out and back in and that doesn't fix the problem; it has to be rebooted. I've also tried killing and restarting knetworkmanager and /etc/networking without success.

I'm up to having to reboot my laptop twice a day and can't put it to sleep. Ug. :(

bryan@condor:~/proj/technaplan$ lsb_release -rd
Description: Ubuntu 9.10
Release: 9.10

bryan@condor:~/proj/technaplan$ dpkg -l *network*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==========================-==========================-====================================================================
un bluez-network <none> (no description available)
ii libqt4-network 4.5.3really4.5.2-0ubuntu1 Qt 4 network module
ii libqtscript4-network 0.1.0-3 Qt Script bindings for the Qt 4 Network library
ii network-manager 0.8~a~git.20091013t193206. network management framework daemon
un network-manager-gnome <none> (no description available)
un network-manager-kde <none> (no description available)
un network-manager-pptp <none> (no description available)
un plasma-applet-networkmanag <none> (no description available)
un plasma-widget-network-mana <none> (no description available)
ii plasma-widget-networkmanag 0.9~svn1029786+ag1-0ubuntu Network Management widget for KDE4 Plasma
un plasmoid-network-manager <none> (no description available)
bryan@condor:~/proj/technaplan$

-bryan

ProblemType: Bug
Architecture: i386
Date: Thu Feb 11 10:24:19 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/systemsettings
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: systemsettings 4:4.3.2-0ubuntu7.1
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
SourcePackage: kdebase-workspace
Uname: Linux 2.6.31-19-generic i686