Redmine currently uses a hash parameter as the url to pass to url_for in many places
for example - lib/redmine.rb (pusing items to menu)
I have a complex plugin which uses namespaces for controllers and models.
Since url_for keeps the current namespace it will create the wrong url.
You can read more about the problem here:
http://blog.enriquez.me/2010/2/21/namespaced-controller-and-link-to-helper-in-rails/
Please consider adding "/" to controller when using url_for or use restful paths.
Thanks.