I have re-added my only user account to the admin group although it already was. Now, Update Manager also asks me for a password.
This can be reproduced when booting a Maverick live CD, creating a new user and adding him to the admin group. Then logout and login as the newly created user and try to install packages via Software Center. You will get asked for a password despite the "%admin ALL=(ALL) NOPASSWD: ALL" line in /etc/sudoers.
I have re-added my only user account to the admin group although it already was. Now, Update Manager also asks me for a password.
This can be reproduced when booting a Maverick live CD, creating a new user and adding him to the admin group. Then logout and login as the newly created user and try to install packages via Software Center. You will get asked for a password despite the "%admin ALL=(ALL) NOPASSWD: ALL" line in /etc/sudoers.