I searched on GOOGLE for "REDHAT UPDATE /bin/ls changes"
and got back:
http://www.google.com/search?q=Redha...chnges+/bin/ls

And then i checked /var/log/rpmpkgs and looked for fileutils and found that i have fileutils-4.1-10.1.i386.rpm and fileutils-4.1.7-4.i386.rpm installed. Would that have caused the changes.Casue i think i remember seeing that as one thing i was updating.

http://online.securityfocus.com/archive/1/260936