Systray icon appears, dissapears and duplicates

Binary package hint: gnome-power-manager

Hi all,

I've switched to Lucid alpha yesterday, and today, when I started my usual Fluxbox session, I found out this strange behaviour:

 1) When starting fluxbox, it automatically runs gnome-power-manager, so the icon appears in my systray
 2) After 30 seconds, the icons dissapears. Anyways, there is an empty space where it was placed. Right click doesn't work either over the place where the icon was
 3) After another 30 seconds a new icon appears, but in a new space.
 4) Steps 2 and 4 repeat forever.
 5) If I kill gnome-power-manager, all empty spaces (and existing icon if any) dissapear from the systray, it this goes back to normality.

I'm attaching a screenshot of how the systray looks like after 3 or 4 minutes.

I'm running fluxbox built from the git head, but I never had such a problem with previous versions of gnome-power-manager.

Rodrigo