Although Wisconsin DNR continues to improve fGIS, a change in the license agreement for the TatukGIS Developer Kernel would require payment of royalties to distribute newer versions of fGIS outside of DNR programs. A list of updates to fGIS since the September 24, 2005 build is available, which might explain bugs you encounter in the older version. (You can continue to use and freely share versions of fGIS released before November 7, 2005.