Fixing bug in new metadata implementation.

IPython/frontend/html/notebook/notebookmanager.py

@@ -211,7 +211,8 b' class NotebookManager(LoggingConfigurable):'
             else:
                 i = i+1
         notebook_id = self.new_notebook_id(name)
-        nb = current.new_notebook(name=name)
+        metadata = current.new_metadata(name=name)
+        nb = current.new_notebook(metadata=metadata)
         with open(path,'w') as f:
             current.write(nb, f, u'json')
         return notebook_id