This is what I see in the Raw Sent Packets tab of the Smack Debug Window.
<stream:stream xmlns='jabber:client' to='mysite.com' xmlns:stream='http://etherx.jabber.org/streams' version='1.0' from='sumea@mysite.com' xml:lang='en'>
<presence id='Zy7dr-167' type='unavailable'><c xmlns='http://jabber.org/protocol/caps' hash='sha-1' node='http://www.igniterealtime.org/projects/smack' ver='NfJ3flI83zSdUDzCEICtbypursw='/></presence>
</stream:stream>