Trying to build xfce4-mixer from git under xubuntu 12.10 32bit with all xfce components compiled from git, I get this error:

xfce-mixer-plugin.c: In function 'xfce_mixer_plugin_set_property':
xfce-mixer-plugin.c:366:23: error: unused variable 'enable_keyboard_shortcuts' [-Werror=unused-variable]
cc1: all warnings being treated as errors
make[1]: *** [libmixer_la-xfce-mixer-plugin.lo] Errore 1
make[1]: uscita dalla directory "/home/prova/Xfce/xfce4-mixer/panel-plugin"
make: *** [install-recursive] Errore 1