While testing the version published in French, a guy said Gcompris did not launch from the desktop icon. In fact it does but takes so much time you could start 3 other programs while it launches.
I tested, and confirm. I tried to use the good prelink program to attempt to solve the issue. At same time I try to spare Cdroms, so once prelink installed, configured, and the install of pclinuxos education fr remastered once more, I installed to USB Stick with the great script from Just18, PCLinuxOS Live USB. The result is : in Live, it's still very long before it starts while in Persistent mode it runs instantly, provided it has been ran once, before.
I all cases the latest in French contains the hidden config files from Gcompris : in the home of "school" (ecole in French) and in /etc/skel/.config/
If anyone has a good idea about how it occurs and how to eventually solve this, it would be most welcome !