[sudo-users] sudo: setuid(): Operation not permitted

[Todd C. Miller]

This should be fixed in sudo 1.8.1, can you try the 1.8.1 beta?

Source:
http://www.sudo.ws/sudo/dist/beta/sudo-1.8.1b2.tar.gz

Packages:
http://www.sudo.ws/sudo/dist/beta/packages/index.html

 - todd