Well... hopefully my experiences can help someone else down the road. I have found out what the issue is. Pure-ftpd will run under Fedora 9 64bit, but the active feature will not work. I reinstalled Fedora 9 32bit and pure-ftpd is working flawlessly now. Unrelated, but possibly useful to others, Steelvine management software for Silicon Image raid controllers also seems to require 32bit libraries to run correctly. Good luck all!