I was in need to use the cpufreq-selector from command line in my new ubuntu intrepid ibex, I found several posts about doing this way: (was for 8.04, not for 8.10), so I decided to take the risk and try it…
sudo chmod +s /usr/bin/cpufreq-selector
and it works! …. In a way, I mean I can change it from command line, even without being root, BUT, it killed my gnome-applet, so I cannot change it from gnome…
I tryied to restore the perms, but no luck, so I post this advice, I let you know if I can fix it (without reinstalling ubuntu)