I took care of the permissions. Now it says:
Caused by:hudson.plugins.git.GitException http://stacktrace.jenkins-ci.org/search?query=hudson.plugins.git.GitException: Command "git tag -a -f -m Jenkins Build #13 jenkins-SqueakTrunk-13" returned status code 128: stdout: stderr: *** Please tell me who you are.
Run
git config --global user.email "you@example.com" git config --global user.name "Your Name"
to set your account's default identity. Omit --global to set the identity only in this repository.
I did some of that and it is not yet mollified:
chriscunnington@box3-squeak:/var/lib/jenkins$ git config --global user.email "frank.shearar@gmail.com" chriscunnington@box3-squeak:/var/lib/jenkins$ git config --global user.name "Frank Shearar"
Chris