A new maintenance release of FDS, version 5.4.2, is available at
http://code.google.com/p/fds-smv/downloads/list
This release contains a number of bug fixes related to experimental routines known collectively as "FDS 6". These changes should not affect the current FDS 5 default functionality. We are gradually working in these improvements to FDS while continuing to maintain the current capabilities. This should make the transition to the new routines smoother once they have been thoroughly shaken down. Many thanks to those of you who have been playing with the new routines. It is only through this process that we can work out the kinks.