Remove the override of grok views static method. This problem started with a merge at five.grok, http://svn.zope.org/five.grok/trunk/src/five/grok/meta.py?rev=123298&r1=112163&r2=123298
That merge removes the static resources grokker, maybe a not desired side effect of the merge. The static resource is documented by dexterity, and used by this package.
To fix this problem, if static resources grokker doesn't come back to five.grok, we can use a method also documented at dexterity, http://plone.org/products/dexterity/documentation/manual/developer-manual/advanced/static-resources
This way we use @@plone_portal_state/navigation_root_url as a base for our resources instead of the problematic static method.