changed property value in signal

hi
I am new to systemd and dbus
I am using systemd 208, libdbus-1-3_1.4.18-1ubuntu1.4_i386.deb
I am to monitor unit stop/failure in my application .
So I am subscribing to propertiesChanged signal and paring SubState.
The propertieschanged message contains a dictionary and invalidated  list
of properties.
But the dictionary is empty(which is supposed to contain new value of
changed properties), so i am left with querying new values of the changed
property from list of invalidated properties list.
- please let me know how do i get new values in the signal msg itself
- is this issue fixed.? if yes in which version? which version i need to
upgrade
- where do i see commit logs/ version history
- i upgraded to dbus 1.8.18 and still using system 208.
and verified from dbus-mon after stopping an app that still i dont get new
values .
shoudl i also upgrade systemd??
(i dont dull understand how systemd and dbus are related)

Thanks
Prad

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