Since upgrading to the latest N800 code, Jabber connections that previously worked are no longer reliable. Connections to XMPP/Jabber servers get disconnected and reconnected every 7 minutes (like a clock).
I connect to two Openfire jabbers servers, Jabber.org and Gtalk. The GTalk and Jabber.org XMPP connections seem to be stable. The Connections two Openfire servers are not. I own one of the Openfire servers. It's logs show a client disconnect.
I have verified that this is 'idle timeout' related. The XMPP server thinks that the N800 is no longer hanging around & so it disconnects the client session.
Setting Openfire's xmpp.client.idle = -1 seems to be a workaround.