@Tom-Elliott It was a 1.4.1 that I have upgraded to 1.4.2
This is what I found in fog tarball :
root@gonzales2:~/fog_1.4.2# grep -r 454478 *
packages/web/lib/fog/system.class.php: define(‘FOG_VERSION’, ‘454478’);
So there is surely a mistake in tarball
I modified the php file for my instance so for me, it is solved