Hi Francois,
I am using the latest version of the face-to-module and also it is fitted with Moodle version 1.9+. I had attached the two files where I had made changes in the quiz/view.php. (From the line Nos. 369 to 371 - commented lines). But I had not made any changes in the mod/facetoface/lib.php.
By the above files you I hope you can spot the changes happening in the module.
Thanks for the help.
Iyappan