I'm still encountering this bug. And it is a bug, not a feature. "Incomplete" accounts are in fact saved by mc. Evidence: any additional accounts get the name "jabber1","jabber2", "jabber3", etc. These accounts show up in gconf under /apps/telepathy/mc/accounts/jabber1, 2, 3, etc. So it is a bug in empathy, not a feature of mission control.
I'm still encountering this bug. And it is a bug, not a feature. "Incomplete" accounts are in fact saved by mc. Evidence: any additional accounts get the name "jabber1" ,"jabber2" , "jabber3", etc. These accounts show up in gconf under /apps/telepathy /mc/accounts/ jabber1, 2, 3, etc. So it is a bug in empathy, not a feature of mission control.