.override isn't working

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http://askubuntu.com – I have a file /etc/init/boinc-client.override with the single line "manual" that I use to prevent the BOINC client from starting up. (I don't want it hogging CPU time away from Folding@Home, for now anyway.) But, after restarting, I noticed that BOINC had started itself up again. I am certain I have upstart. What should I do? (HowTos)