Version:           2.2 (using KDE 3.1.93 (CVS >= 20031111), compiled sources)
Compiler:          gcc version 3.3.1 (Mandrake Linux 9.2 3.3.1-2mdk)
OS:          Linux (i686) release 2.4.22-21mdk

If i choose to order the file list alphabetically and open unit.cpp unit.h and unitdescriptor.cpp they got sorted this way

unit.cpp
unitdescriptor.cpp
unit.h

that is incorrect, because everyone knows that in an alphabetical sort, that words are sorted as 

unit.cpp
unit.h
unitdescriptor.cpp

or maybe 

unitdescriptor.cpp
unit.cpp
unit.h

depending if d is lesser or not that . 
but unit.cpp and unit.h must be together.