Proprietary branches break code import listing

The code import listing will raise a 403 if one of the import branch is Proprietary. This listing 403's for me, but since the set is changing the batch might be different
https://code.launchpad.net/+code-imports/+index?field.rcs_type=BZR_SVN&field.rcs_type-empty-marker=1&field.review_status=&field.review_status-empty-marker=1&submit=Submit&batch=75&direction=backwards&memo=1800&start=1725

The branch comes from a public souce (http://dokan.googlecode.com/svn/trunk/) and it is owned by a public team (fiecom-committers) in a public project (fiecom). The project's branch sharing policy is Proprietary only. This may be a contradiction of rules because I don't think it should be possible to have a non-public imported branch -- Lp would need to support user-specific authentication to import the branch. I think this branch should belong to the unregistered dokan project.

Expression: <PathExpr standard:u'codeimport/branch/target/name'>
   - Names:
      {'args': (),
       'context': <lp.code.model.codeimport.CodeImportSet object at 0x9795b10>,
       'default': <object object at 0x2b55fd7d2390>,
       'loop': {},
       'nothing': None,
       'options': {},
       'repeat': {},
       'request': <lp.code.publisher.CodeBrowserRequest instance URL=https://code.launchpad.net/+code-imports/+index>,
       'template': <z3c.ptcompat.ViewPageTemplateFile object at 0x947a790>,
       'view': <zope.browserpage.metaconfigure.SimpleViewClass from /srv/launchpad.net/production/launchpad-rev-16361/lib/lp/code/browser/../templates/codeimport-list.pt object at 0x131bf050>,
       'views': <zope.app.pagetemplate.viewpagetemplatefile.ViewMapper object at 0x10e4a3d0>}
...
__traceback_info__: (<Branch u'~fiecom-committers/fiecom/dokan' (555406)>, 'target', ['name'])
Unauthorized: (<Branch u'~fiecom-committers/fiecom/dokan' (555406)>, 'target', 'launchpad.View')