anchor.diff:      Mbr = vtree:calc_mbr(Mbrs),
       {ok, RootPos} = couch_file:append_term(Fd, {Mbr, #node{type=inner}, Poss}),
   
  -    ?debugVal(RootPos),
  +    %?debugVal(RootPos),
       Nodes = lists:foldl(fun(I, Acc) ->
           %{NodeId, {NodeMbr, NodeMeta, NodeData}} =
           %    vtree_test:random_node({I,23+I*309,45}),
  
positive.code:             {NewOmtPos, TargetHeight+1};
          % split the node and create new root node
          true ->
  ?debugMsg("bar"),
              % NOTE vmx: These are not a normal nodes. The last element in the
              %     tuple is not the position of the children, but the position
              %     of the node itself.
  
negative.code: 
  %%%%% Tests %%%%%
  
  -ifdef(runnall).
  
  % XXX vmx: tests with function (check_list/6 ) are missing
  chunk_list_test() ->
  