It's something screwy with the recent iTunes updates, but is not causing a problem. They are not really errors, just sloppy housekeeping in the installer by Apple.
Also you may see this;
2013-09-26 14:12:14 -0400: Repaired“Applications/iTunes.app/Contents/Resources/zh_TW.lproj/UniversalAccess.nib” 2013-09-26 14:17:34 -0400: ACL found but not expected on “private/var/root/Library” 2013-09-26 14:17:34 -0400: Repaired “private/var/root/Library” 2013-09-26 14:17:34 -0400: ACL found but not expected on “private/var/root/Library/Preferences” 2013-09-26 14:17:34 -0400: Repaired “private/var/root/Library/Preferences” 2013-09-26 14:18:19 -0400: ACL found but not expected on “private/etc/hosts” 2013-09-26 14:18:19 -0400: Repaired “private/etc/hosts” 2013-09-26 14:18:26 -0400:
You can also usually ignore any "ACL found but not expected..." message. These messages can occur if you change permissions on a file or directory; they are accurate, but generally not a cause for concern.
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