sudo diskutil repairPermissions

sudo diskutil repairPermissions /
Started verify/repair permissions on disk0s2 Lion
Group differs on “Library”; should be 0; group is 80
Permissions differ on “Library”; should be drwxr-xr-x ; they are drwxrwxr-t
Repaired “Library”
Permissions differ on “Library/Application Support”; should be drwxr-xr-x ; they are drwxrwxr-x
Repaired “Library/Application Support”
[ / 0%..10%..20%......................................... ]
[ \ 0%..10%..20%..30%..40%..50%..60%..70%..80%........... ]
[ | 0%..10%..20%..30%..40%..50%..60%..70%..80%..90%...... ]
Finished verify/repair permissions on disk0s2 Lion