It is not clear what Synchronisation Off in the menue means. Does it mean it is off or it is to turn it off? Anyway, I did not see any difference whether it showed on or off. In both cases sync continued, e.g. Activity messages were continuing to flow in.
I would choose a less confusing way in the menue: only "Sychronisation On" instead of On or Off but indicating whether the user chose On or not On by a tick in front of Sychronisation On - that's a conventions many other programs chose. Sticking with such a convention reduces the risk for confusion.