Goggles Music Manager 0.11 is the new stable release. It is mostly a code cleanup release and drops supports for some of the older libraries that gogglesmm has supported in the past.
Support for Taglib 1.5.x, Taglib-Extras and the buildin asf / mp4 tag readers have been removed in favor for taglib 1.6. If you need asf and/or mp4 file support, taglib 1.6 will have to build with those options enabled.
The buildin iconset has been removed and gogglesmm will now load its icons from the standard icon themes in /usr/share/icons.
Also in this release, a new partial mpris dbus interface has been added.