Shutter PPA will not authenticate in Intrepid

I copied this public key (no extra spaces) and put in in a new file named shutter.key on my desktop.

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: SKS 1.0.10

mI0ESXWdeAEEAL3XbmiasfSzhJ84HPSZaKxKCzSmJmzck/zyBADJfNq018XHmvfsdqNgNwqG
PcSG52iI11ZxVOU/VYfqozbSenGQg3sCittv//ydZEzfYpPvPJ3DVV9xgNR4JL0Pr+KHCGQz
ZrCbdez/l1MeRoaYcgjpiTuLg+0GBkU+hcqX6vchABEBAAG0HUxhdW5jaHBhZCBQUEEgZm9y
IEdTY3JvdCBUZWFtiLYEEwECACAFAkl1nXgCGwMGCwkIBwMCBBUCCAMEFgIDAQIeAQIXgAAK
CRD8bX2dAJ7WFc5nA/4nzBBNUfZIpadxrL6JthfwPcQi7k7zcDlPUqjt5g8WmYI9w0dySjQ9
YNWJ9IfLJmwt09bLzsV30uDFLboVgVHznPNQqIUG/xqvPf9EvNKX0Wv1+5ml8xVSjZzPe3x1
NSivgvAAGPu1xf2FrHIawolA5i/stMXsdHR/BRZxUqgn8LQeTGF1bmNocGFkIFBQQSBmb3Ig
U2h1dHRlciBUZWFtiLYEEwECACAFAkmbchsCGwMGCwkIBwMCBBUCCAMEFgIDAQIeAQIXgAAK
CRD8bX2dAJ7WFR45A/4pnu17GMVRnH1PSQpTXDeGtySsPerCeFZ6+DlmXsuzFXitczOqerW6
YCjTH/8BWmO7BMvy7dwfmvPScvY8XUVzDbR37eyk9wnFqBPKnvWI5NV+rFDCMRokN0y2tXSg
ujvtRcYkbnVGJeLWmM/AUOkknDLoY7txPNPx0ci5Ce908w==
=z6tr
-----END PGP PUBLIC KEY BLOCK-----

When I import the key file on the Software Sources Authentication tab, it apparently works OK. On that entry, I see "009ED615 2009-01-20" However, when I go into Synaptic and Reload, I get this error:

W: GPG error: http://ppa.launchpad.net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 60D11217247D1CFF

I've tried and retried the various steps for a couple hours now...to no avail. BTW, I was able to get Shutter downloaded and installed, but I sure wish I could use Launchpad successfully. Any idea what I'm missing?

I am using Intrepid (8.10) 32-bit.