Comment 2 for bug 840986

StacktraceTop:
 pa_operation_unref (o=0x0) at pulse/operation.c:68
 pm_update_mic_gain (source_index=<optimized out>, new_gain=...) at /build/buildd/indicator-sound-0.7.6.1/./src/pulseaudio-mgr.c:195
 handle_event (mi=<optimized out>, name=<optimized out>, value=<optimized out>, timestamp=<optimized out>) at /build/buildd/indicator-sound-0.7.6.1/./src/voip-input-menu-item.c:128
 dbusmenu_menuitem_handle_event (mi=0x2084010, name=0x7fcd68001460 "update", variant=0x7fcd68003c40, timestamp=0) at /build/buildd/libdbusmenu-0.4.93/./libdbusmenu-glib/menuitem.c:1707
 event_local_handler (user_data=0x7fcd68005270) at /build/buildd/libdbusmenu-0.4.93/./libdbusmenu-glib/server.c:1528