[eluser]Michel-Ange[/eluser]
I apologize, I forgot to clean some details concerning the profiler.
The solution :
1. Delete the application/librairies/MY_Profiler.php file, not used anymore
2. Comment the language function in the file application/libraries/MY_Loader.php (line 340)
... and the profiler will be back from outer space !
You can enable it directly from Base_Controller (in Librairies/MY_Controller.php)
These bugs will be corrected in the 0.92. Thanks guys !