Display of Pages with no Default View is apparently broken

(Bug, Investigate , Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )

Summary: Not sure what's going on, but it looks like the traditional list of the properties of this Thing has gone away.

Note that Instances with no Default View show properly. It's only when you create a plain Simple Thing, give it Properties, and don't give it a Default View that it fails.

Granted, this is a weird edge case, and I'm downgrading it to High because of that. But it's still broken.