Comment 6 for bug 526041

I have similar behaviour of "migrating" applet in the notification area. As I had also the "menu not shown" bug, I did wait for the 2.29.2-0ubuntu9 release to see if the problem was just one. The menu of the applet is now back, but I have still the "on and off" behaviour of the applet.
gnome-power-manager keeps running, but the battery icon in the notification area appear and disappear. Every time it pops up again, it moves the notification area boundary on the top panel some pixels to the left (vanilla gnome desktop). Yesterday evening, after some hours of work, the notification area eventually "ate" up the whole top panel space Seems each time it receives a signal from the battery, the indicator does not remember where it was placed and places itself some pixels on the left.