Printers compatible with case sensitive hardened Mountain Lion
Epson Expression Premium XP-605 is installed and running correctly on
Lion (10.7.4) on top of a case sensitive filesystem.
The driver version I used is the 9.0.5 from the Epson web server.

This means that this software went through a quality control able to detect programming errors where the same file may be named differently
in different places of the source programs.