Will not throw 404 for embedded views that also have a path.
Hopefully the last alpha.
Date Modules "date_browser" view uses arguments but does not define a % in the path. If you have a view that defines a default argument, then this might cause a 404 when you give it an argument.
When it should be example.com/calendar/% because it takes an argument; but then example.com/calendar will not work... need to dig into the view & cover this situation.