If Presence visibility is set to Subscribed, then it's not possible to query ones OWN presence. We're using the plugin from a server and this gives unavailable.
which seems overly secure It's because you are not in your own roster, so the call to presenceManager.canProbePresence() fails.
I patched the PresencePlugin.java to support query of self if in Subscribed mode.
r12994 thanks for the patch