Cd9660.util permissions? (Score 1)

Last night I ran Repair Permissions after installing the new Security Update. The only change was to cd9660.util. This same change occured on two of my computers. The message was:

Repairing permissions for "OS X"
Determining correct file permissions.
Permissions differ on ./System/Library/Filesystems/cd9660.fs/cd9660.util , should be -rwsr-xr-x , they are -rwxr-xr-x
Owner and group corrected on ./System/Library/Filesystems/cd9660.fs/cd9660.util
Permissions corrected on ./System/Library/Filesystems/cd9660.fs/cd9660.util

Checking in the Terminal I confirmed:

-rw-r--r-- 1 root wheel 11 24 Sep 11:19 cd9660.label
-rw-r--r-- 1 root wheel 6 24 Sep 11:19 cd9660.name
-rwsr-xr-x 1 root wheel 20436 19 Dec 23:59 cd9660.util

My question:

I am unfamiliar with an "s" permission for root (-rws vs. -rwx). Is this correct?

I haven't noticed any problems but I haven't checked either.

--Dan