* In some cases, unfs3 issues system calls like stat() with a path
  beginning with double slashes. This happens to work on most UNIX
  systems, but this is not guaranteed by POSIX. See
  http://www.opengroup.org/onlinepubs/009695399/xrat/xbd_chap04.html
  or section 2.2.2.102 in POSIX-1003.2-Draft-12. 

Windows platform:

* Cluster extensions have not been tried on this platform.

* Investigate possibilities for changing times on directory