Version:            (using Devel)
Installed from:    Compiled sources

Importing the following classes works as excepted. 

namespace Base {

/** 
    holds a single xml element
    A xml element is setup of a tag name, tag attributes and content 
*/
class Element {
...
);
class Assembly : public Base::Element {
    public: 

        Assembly() : Base::Element("assembly")
        {
        }
};

}

In the list view there is a 'Base' package contaning two classes Element and Assembly. Both class are assigned to the Base namespace (verified by opening the class properties, as Package 'Base' is selected)

Importing the following class afterwards or at the same time as the previous classes 

class Assembly : public Base::Assembly {
    public: 

        Assembly()
        {
        }
};

corrupts the class structure.  

A message box complaining that class Assembly is already present raises up and forces the user to enter a new class name (new_class as default taken)

The List view now contains a newly imported class Assembly in the public namespace, which is expected. 

The previously imported class Base::Assembly in the base package is renamed to new_class and is not anymore assigned to the 'Base' package although in the list view it is still named 'Assembly' and located in the Base Package.