Now widget no longer works after 4.4rc3. Any ideas how I can debug it?

[Gilboa Davara]

Hello all,

I've just updated my F12 machine to 4.4rc3.
Since the upgrade, the "now playing" widget no longer displays the
current album/track name/time and the only functional buttons are
"next/previous track" and pause.

I checked upstream and I don't see any bug report concerning the "now
playing" widget and 4.4.
As such I rather post an informative bug report (as opposed to
"widget-no-workie!").
I assume that this widget uses dbus to communicate with amarok, can I
somehow capture/monitor this traffic?

- Gilboa