MATE No sound preview on caja after upgrade

After upgrading all my packages via pkg upgrade, passing the mouse over a music file doesn't trigger a preview of the sound any more.
It might be an issue involving some gstreamer stuff, but which part?
Sound is fine if I use vlc or from within a browser watching youtube.

Any hints?
 
After upgrading Palemoon browser to 32.2.0, now I have sound only from vnc and deadbeef...
And Firefox works too, of course.
 
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