I am seeing an odd problem under x86_64 FC6. A number of different programs that I have tried to install from CD have all failed with the error message of the form... sh: ./MathInstaller: /bin/sh: bad interpreter: Permission denied This happens regardless of whether I am in the root account when I mount the CD or not. I have had to make a tar archive of the contents and of the CDs, untar these on the hard drive and run the installers from there. What is causing this problem under FC6? Thanks in advance for any advice. Jack