It looks very much as though, currently, doing this:-
  - name: Build sudo config file
    action: template src=templates/sudo/sudoers.j2 dest=/etc/sudoers
            owner=root group=root mode=0440
leads to much pain and suffering, because template, uses copy, which
chains file to deal with permissions etc....
And when file runs, sudoers has been put in place with a default
permission (0644 in this case), and sudo then refuses to run because the
permissions are not as it expects 
I'm hoping that the performance speedups for 0.9, which move file into
common and reduce the round trips, will have the side effect of fixing
this pain point 
Nigel.