Battery applet no longer displays charging status

[Redfern-derek]

After upgrading to 13.10, my battery is always shown as 0%, not charging, regardless of its current status.

Ubuntu does recognize that a battery exists, since running the following command:
solid-hardware query 'IS Battery'

gives an output of:
udi = '/org/freedesktop/UPower/devices/battery_BAT0'

I'm running Ubuntu Saucy (13.10) and the version of kde-workspace I'm using is 4:4.11.2-0ubuntu1.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: plasma-desktop 4:4.11.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2
Architecture: amd64
Date: Tue Oct 22 09:47:27 2013
ExecutablePath: /usr/bin/plasma-desktop
InstallationDate: Installed on 2012-11-26 (329 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: kde-workspace
UpgradeStatus: Upgraded to saucy on 2013-10-20 (1 days ago)
XsessionErrors:
 (gnome-panel:2271): Gtk-CRITICAL **: gtk_accelerator_parse_with_keycode: assertion `accelerator != NULL' failed
 gnome-session[2154]: WARNING: Failed to start app: Unable to start application: Failed to execute child process "/usr/bin/jupiter" (No such file or directory)
 gnome-session[2154]: WARNING: Failed to start app: Unable to start application: Failed to execute child process "/usr/lib/jupiter/scripts/jupiter" (No such file or directory)
 (gnome-panel:2271): Gtk-CRITICAL **: gtk_accelerator_parse_with_keycode: assertion `accelerator != NULL' failed
 (gnome-panel:2271): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.34.0/./gobject/gsignal.c:2459: signal `size_request' is invalid for instance `0x2713140'