> > W: GPG error: http://ppa.quickbuild.pearsoncomputing.net precise Release:
> > The
> > following signatures couldn't be verified because the public key is not
> > available: NO_PUBKEY 099723A280479E11
> > Which key do I need? The Trinity key didn't do any good.
> You would need the key from Slavek's PPA on this page:
> Expand the technical details section to see the fingerprint, and click on
> the "What's This" link next to it to get instructions on installation.