I have defined in the GEDCOM configuration
"Show file name in Media Viewer - No".
But I see the file name on the Media Viewer pages.
Even not logged in visitors see the file-name there.
Logged In: YES
I don't understand everything that is going on here, but if you change line 374 of media_ctrl.php from:
if ($this->show_changes=='yes') $ignore = '';
if ($this->show_changes=='yes') $ignore = 'FILE';
then the extra filename disappears. This code was changed in SVN 1486.
This also removes one of the "Format" tags - the one that is defined in the GEDCOM file. It leaves the one that is calculated by media_class.php
I don't know if this is a safe change, but I'm hoping it will give someone a place to start.