phonon::createPath doesn't work with video on Mac OS X

see the attached files
/*
Problem: the phonon::createPath() method for usage with video does
not work well.
Step 1: start up main
Step 2: click option 2 or 3 (video)
Step 3: click on open .mp4 file and selected an .mp4 from your own
directory the video plays well
Step 4: use the go back button
Step 5: then click on something outside of the application
and the application crashes.

Clicking outside of the application while playing does not trigger
the crash.
Using audio only (clicking option 1 (audio)) does not trigger
the crash, for which I concluded that it must have something to do with
the video part.

Including phonon/backendcapabilities.h does not solve the problem

I used the least possible libraries in order to get this setup functioning.
This is very annoying since my application must be able to select/play multiple times
a video.

In order to genereate this bug I used .mp4 files. It might be buggy with other
formats as well.
*/
thougth I coud upload more than 3 files... made an archive, but couldn't delete the other attached files in this bug report.