Comment 40 for bug 529052

I've been having the same problem since upgrading via update-manager -d to Lucid yesterday, on an HP Compaq 6510b, which is a Centrino Duo.

$ apt-cache policy libindicator0
libindicator0:
  Installed: 0.3.4-0ubuntu1
  Candidate: 0.3.4-0ubuntu1
  Version table:
 *** 0.3.4-0ubuntu1 0
        500 http://mirrors.rit.edu lucid/main Packages
        100 /var/lib/dpkg/status

$ uname -a
Linux [hostname] 2.6.32-15-generic #22-Ubuntu SMP Tue Mar 2 02:24:17 UTC 2010 i686 GNU/Linux

I have the battery set to always display, and this does slow its leftward march, but only as long as it's plugged in. As soon as you unplug it, it disappears/reappears about every thirty seconds (probably how often it's polling acpi for the battery state). My console is also being spammed with this every time it happens:
(gnome-power-manager:4141): GLib-GObject-WARNING **: invalid cast from `GtkStatusIcon' to `GtkWidget'
(gnome-power-manager:4141): Gtk-CRITICAL **: gtk_widget_hide: assertion `GTK_IS_WIDGET (widget)' failed