Under certain conditions there is a difference between
Mac OS X and Linux (both 2.4.1) with regard to the
value of the variable sys.path[0] which should contain
the directory from which the script was called.

This difference appears when the script is called
through a symbolic link by a different user. See the
attached example. It should be executed once by the
owner of the TESTPATH directory:

   ~/TESTPATH/sub1/testpath.py
and
   ~/TESTPATH/sub2/testpath.py

In both cases, under Linux and Mac OS X, the result is:

   /home/owner/TESTPATH/sub1

If a different user executes:

   ~owner/TESTPATH/sub1/testpath.py
and
   ~owner/TESTPATH/sub2/testpath.py

he gets the same results under Linux:

   /home/owner/TESTPATH/sub1

but two different results under Mac OS:

   /Users/owner/TESTPATH/sub1
and
   /Users/owner/TESTPATH/sub2

This seems like a minor problem but it breaks my
application because sys.path[0] is the first place to
look for imports!

I am not sure whether this is a Python problem or
something to do with the Mac OS X. My Mac OS X version
is 10.4.3.