Changing permissions of Binaries installed by apt

[Nils]

Hi all,

I'm the sysadmin of a small group of people. To mount the fileserver I
wrote a small script which uses /sbin/mount.cifs from the smbfs
package. To make the normal users able to mount w/o sudo (and entering
the passwd every time) I set the permissions of mount.cifs setuid
(chmod +s $(which mount.cifs)).

However I noticed that the permissions of mount.cfis changed some time
ago (not sure if it was related to an update) and I had to chmod +s
the binaries again. I'm not what did this, maybe apt-get when
updating?

Thanks for advice!

Regards Nils