ACL found but not expected on "Library/iTunes". Repaired "Library/iTunes". If I run Repair Permissions again, I get the same log. So clearly it's not being fixed. And the core symptom (can't sync) ...
Where I currently work is in the middle of a huge Filewave to Casper, 10.x to 10.8 migration project. We're doing all the prep work right now so hopefully we'll be ready to rock and ruin next month.