Strange ACL Permissions


I noticed something strange when I was trying to install a new iTunes
package on my Mac. When I pressed the install button. It momentarily
greyed out and then went back to blue.

I opened up the disk utility and tried to repair permissions. When I
do I see the below. But no permissions seem to get fixed. I run fix
permissions again and get the same errors below. I booted into single
user mode and fsck -fy the disk. It found no problems. Any idea what's
going on here and what the remedy is?


Repairing permissions for “Boot”
Reading permissions database.
Reading the permissions database can take several minutes.

Group differs on "private/etc/cups", should be 0, group is 26.
ACL found but not expected on "Applications".
ACL found but not expected on "Library".

Permissions repair complete

.