Strange case sensitive problem with autoload own libraries

The use of MY_ as a class prefix is specifically intended for extending native CodeIgniter libraries.
Eg. $this->load->library('banana') will look for application/libraries/Banana.php, application/libraries/MY_Banana.php and system/libraries/CI_Banana.php.

If you ask for $this->load->('my_banana'), CI will look for application/libraries/My_banana.php, application/libraries/MY_My_banana.php and system/libraries/CI_My_banana.php.

On Windows, 'MY_Banana' would match any case, eg My_bAnAnA.php, whereas on Linux, CI will look for My_banana.php, making something appear to work locally although it fails on a production server.