git flow fails to initialize with non-default production and development branches

1. Open a repository that has a master branch
2. Initialise repository for git flow
3. For Production branch change "master" to "production"
4. For Development branch change "develop" to "master"
5. Click OK
6. From Repository menu select "Start New Release" under "Git flow / Hg flow"
7. Enter a release and click OK
   EXPECT: Release branch created
   ACTUAL: error

   git release start v1
   fatal: Not a gitflow-enabled repo yet. Please run "git flow init" first.
   Completed with errors, see above
   

NOTE: the configuration file does not look right:

[gitflow "branch"]
	master = master
	develop = master

But the same error occurs after changing this to:

[gitflow "branch"]
	master = production
	develop = master

Initialising git flow with the defaults does work.