Created attachment 5312 Update to XFCE_PANEL_PLUGIN_REGISTER Proposed patch updates from the per-4.8 panel registration method. Also updates the gtk about function for the new field and updates the makefile for the plugin.
Pushed to master in: http://git.xfce.org/xfce/xfce4-power-manager/commit/?id=81ca9ce560854b6c2c6f6194ef5652ff16ba4eea