The "fix" versions are full copies of the source with bugfixes included. The most recent versions should always be used. Version changes are listed below. Fix 1: --Bug in Hummer_Storey_Recomb_Factor_25 caused the code to fail for some low temperatures, reported by Leticia Martin Hernandez. --Added high and low temperature bounds. Code will complain and exit if bounds are exceeded. Fix 2: --Overzealous assert in Helium.c was removed, again thanks to Leticia Martin Hernandez. --Added nmax limit on windows machines. Lack of long doubles precludes nmax greater than 84. --Removed hidden .gdbinit file, an annoying initialization file for gdb Ryan Porter