importing previous version in QML does not work

I installed version 1.1 beta from here:

http://labs.qt.nokia.com/2010/10/04/important-update-on-qt-mobility-1-1-0-beta-package/

And then tried to run an example from here:

http://doc.qt.nokia.com/qtmobility-1.1-tp/qml-video.html

Running the example does not work because it uses

import Qt.multimedia 1.0

Changing that to

import Qt.multimedia 1.1

worked.

Is there no backwards compatibility when using QtMobility or is this a QML issue?