Hello all, I have some code at my work for calculating Xray power spectra, and when I compile it on different Architecture's versions of GFortran I get different results: 1&2). Mac PPC (gfortran binary downloaded from your site: http://gcc.gnu.org/wiki/GFortranBinaries) and 64-bit Latest Ubuntu (downloaded from standard repos for Ubuntu) give the exact same results. 3). Mac Intel (gfortran binary downloaded from your site: http://gcc.gnu.org/wiki/GFortranBinaries) gives an answer two orders of magnitude smaller, but following the same basic trends. Compiles in all three with no warnings or errors, exact same code on all three. I know that you have no idea what kind of data I'm looking at, or the output I have, etc. Basically I'm hoping someone can just tell me if one or two or all of these binaries are known to have problems, and maybe if there is one I should trust more, or if there are any super-obvious reasons I should be considering. Thank you all very much for your time, and any suggestions would be very much appreciated. Jayson