I also have observed this problem. `dbus-monitor --session` shows the following when I click on a menu item,
signal sender=:1.74 -> dest=com.canonical.Unity.Panel.Service serial=207627 path=/com/canonical/Unity/Panel/Service; interface=com.canonical.Unity.Panel.Service; member=EntryActivated string "" struct { int32 0 int32 0 uint32 0 uint32 0 } method call sender=:1.74 -> dest=:1.1485 serial=207628 path=/org/ayatana/NotificationItem/nm_applet/Menu; interface=com.canonical.dbusmenu; member=EventGroup array [ struct { int32 43153 string "clicked" variant int32 0 uint32 636178867 } ] error sender=:1.1485 -> dest=:1.74 error_name=org.gtk.GDBus.UnmappedGError.Quark._LIBDBUSMENU_2dGLIB.Code0 reply_serial=207628 string "The IDs supplied '[43153]' do not refer to any menu items we have"
I also have observed this problem. `dbus-monitor --session` shows the following when I click on a menu item,
signal sender=:1.74 -> dest=com. canonical. Unity.Panel. Service serial=207627 path=/com/ canonical/ Unity/Panel/ Service; interface= com.canonical. Unity.Panel. Service; member= EntryActivated ayatana/ NotificationIte m/nm_applet/ Menu; interface= com.canonical. dbusmenu; member=EventGroup
variant int32 0 org.gtk. GDBus.UnmappedG Error.Quark. _LIBDBUSMENU_ 2dGLIB. Code0 reply_serial=207628
string ""
struct {
int32 0
int32 0
uint32 0
uint32 0
}
method call sender=:1.74 -> dest=:1.1485 serial=207628 path=/org/
array [
struct {
int32 43153
string "clicked"
uint32 636178867
}
]
error sender=:1.1485 -> dest=:1.74 error_name=
string "The IDs supplied '[43153]' do not refer to any menu items we have"