I would rather say it is a C++ bug than an Unix rule. C language is case sensitive and if you don't pay enough attention that kind of things will happen when sorting a list.

Good to know what this was about.  I will take the appropriate measures in P3dO.
Thanks pakled for raising this up, and thanks to the others for the support.

Yarp
www.senosoft.com

Yarp - author of P3DO Organizer for Poser