Upower 0.99 is now required by gnome 3.12. As a result, we are trying to have the transition completed this cycle. The new release changes the SONAME, changed from the "changed" signal to "notify" as well as the function signature, and drops suspend support (which systemd now handles). This means nearly all packages that use upower will need changes.
A number of upstreams already have fixes (gnome, xfce, mate, cairo-dock, and telepathy) but a few packages need work. If anyone involved with sugar or kde could let me know the status, that would be great.
The bug report is at https://launchpad.net/bugs/1330037 .
wmbattery will need removal, as it is orphaned and broken with new linux anyway