We will be pushing a patch live tomorrow. Players will be returned to the title screen from their activities and then be required to log in to Destiny again after installing the patch.
Joining a Private Match in progress may sometimes return players in-game back to Orbit.
Bungie is aware that on occasion, players participating in a Private Match may be returned to Orbit with ERROR CODE: QUAIL when a player joins a match in progress.
If this occurs, the Fireteam leader must restart the match. We apologize for this inconvenience.