qdbusviewer not setting up method invocation correctly.

qdbusviewer fails to properly call org.gnome.Rhythmbox.setElapsed

How Reproducible:
Every Time.

Steps to Reproduce:

1) Start Rhythmbox. Play a long song.

2) Start qdbusviewer

3) Start dbus-monitor --session

4) Using qdbusviewer Invoke org.gnome.Rhythmbox.setElapsed with 10 as the first and only argument. The 10 represents 10 seconds.

Expected Result:

Song skips to 10 second mark and continues playing.

Actual Result:

No error indication from qdbusviewer (cough, cough).

dbus-monitor reports:

method call sender=:1.110 -> dest=org.gnome.Rhythmbox serial=84 path=/org/gnome/Rhythmbox/Player; interface=org.gnome.Rhythmbox.Player; member=setElapsed
int32 10
error sender=:1.102 -> dest=:1.110 error_name=org.freedesktop.DBus.Error.UnknownMethod reply_serial=84
string "Method "setElapsed" with signature "i" on interface "org.gnome.Rhythmbox.Player" doesn't exist

Additional info:

This method can be invoked using d-feet and it works as expected.

The error was reported earlier as QTBUG-2160.