can't launch tomboy from bottom dock

I am trying to click the Tomboy icon in the gnome-shell dock. I was previously able to click it to open the list of notes or right click and see a partial list with menu options.

Since upgrading to 12.04 from 11.10, I only see the Tomboy icon greyed out and I am unable to interact with it. Clicking does nothing.

I have to close Tomboy and restart it in order to see the Tomboy window that contains my list of notes.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: tomboy 1.10.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu6
Architecture: amd64
Date: Fri Apr 27 17:10:33 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: tomboy
UpgradeStatus: Upgraded to precise on 2012-04-26 (0 days ago)