LXDE power manager expands panel when connecting/disconnecting power cable

[Aviv]

Xfce4-power-manager 1.0.10 is in the right side of LXPanel (ver. 0.5.8). When connecting and disconnecting the power cable from the netbook (Asus 1001PX), the space between the power manager and its left neighbour increases. This occurs with every connection/disconnection such that the panel expands to reduce the window list (task manager) space.
This is reproducible.
Xubuntu 11.10 is installed together with lubuntu-desktop.
Issue occurs when logging in to lubuntu session.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xfce4-power-manager 1.0.10-4ubuntu0.1
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Sat Dec 24 16:09:21 2011
ExecutablePath: /usr/bin/xfce4-power-manager
InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xfce4-power-manager
UpgradeStatus: Upgraded to oneiric on 2011-10-13 (71 days ago)