Comment 1 for bug 799878

Just a note, so that I don't forget this next week - I had a look at the empty message indicator issue (which looks to be related to this, with the missing property in the test failure), and what is happening is that all of the ItemsPropertiesUpdated signals from indicator-messages-service are being dropped because they apparently don't have the correct signature (the g_variant_type_equal check in gdbusproxy.c:on_signal_received fails)