Created attachment 232247 [details]
complete example demonstrating the problem

Given some code like:

namespace animals
{
  template <typename T> class milk_provider;

  /// Moo!
  class cow
  {
    template <typename T> friend class milk_provider;
  };
}

Doxygen wrongly believes that milk_provider lives in the global namespace. As a result, a bogus class entry is generated, and links within the friending class are wrong.

Complete example attached. Note that two entries are created for 'milk_provider'; one in the 'animals' namespace (the correct one, from the definition and documentation of the class), and one in the global namespace (wrong, from the friend declaration in 'cow').