Comment 68 for bug 569273

You are definitely running the latest libdbusmenu.

Based on what you are saying, there could be another leak somewhere. Does it go away if you pull out the battery?

If you look at comment #43, there are some commands you can run to get a better idea of what is going on.

The sequence is: battery -> kernel -> upowerd -> dbus -> gnome-power-manager -> appindicator

(Also by the way I am not the bug fixer, or a full time Ubuntu developer. Just another affected user.)