Thank you for your help - I just got it working.
I am not sure if this step was or should have been necessary, but the act of installing the service pack for v7.1 made it work.
I had be operating under the assumption that the version I downloaded included the service pack - maybe it didn't or maybe it did... I dunno.
It's working - and that's all I ask for...
As for Centos... we used (in the past) Centos on some servers here... have since moved on to a better place with ubuntu-server installations. Centos, Red Hat and any derivatives including Fedora are not welcome here.
Finally, we've managed to create .deb files out of working installations of Quartus 7.1 - this makes installing Quartus on ubuntu boxes is as simple as point and click - something Red Hat and the like don't and won't support.
I'd share our .deb files with ubuntu fans but I need Altera's permission. Anyone? Altera?
Jon