Problems with using git svn dcommit

I have initialized a GIT repository for using a subversion repository
hosted at beanstalk.com. Only I have problems with it. Each time I try
to trigger GIT SVN DCOMMIT. I am getting the following error message:

Can't call method "full_url" on an undefined value at
/opt/local/libexec/git-core/git-svn line 425.

Really strange on other repos it's working fine. Anyone might know
what could cause this?

Here you can find some output:
http://www.dustyfrog.nl/dropbox/git-svn-1.txt
http://www.dustyfrog.nl/dropbox/git-svn-2.txt

I am currently using GIT 1.6.0.1 on MacOSX 10.5.4 installed via MacPorts