anchor.diff:  
   react_to_env_B10(Retries, P_newprop, P_latest, LatestUnanimousP,
                    Rank_newprop, Rank_latest,
  -                 #ch_mgr{name=MyName, flap_limit=FlapLimit}=S)->
  +                 #ch_mgr{name=MyName, flap_limit=FlapLimit, proj=P_current}=S)->
       ?REACT(b10),
   
       {_P_newprop_flap_time, P_newprop_flap_count} = get_flap_count(P_newprop),
       UnanimousLatestInnerNotRelevant_p =
           case inner_projection_exists(P_latest) of
               true when P_latest#projection_v1.author_server /= MyName ->
  -                #projection_v1{down=Down_inner} = inner_projection_or_self(
  -                                                    P_latest),
  +                #projection_v1{down=Down_inner,
  +                        epoch_number=EpochLatest_i} = inner_projection_or_self(
  +                                                         P_latest),
                   case lists:member(MyName, Down_inner) of
                       true ->
                           %% Some foreign author's inner projection thinks that
  
positive.code:     catch
          throw:{zerf,no_common} ->
              FirstEpoch_p = case get(epochs) of
                                 [0]                                -> true;
                                 [?SET_CHAIN_MEMBERS_EPOCH_SKIP, 0] -> true;
                                 _                                  -> false
                             end,
              if FirstEpoch_p ->
                      %% Epoch 0 special case: make the "all" projection.
  
negative.code:                         ?REACT({b10, ?LINE, [{down_inner, Down_inner}]}),
                          true;
                      false ->
                          #projection_v1{epoch_number=Epoch_current} =
                              inner_projection_or_self(P_current),
                          Latest_GTE_Epoch_p = EpochLatest_i >= Epoch_current,
                          ?REACT({b10, ?LINE, [{down_inner, Down_inner},
                                        {latest_GTE_epoch, Latest_GTE_Epoch_p}]}),
                          not Latest_GTE_Epoch_p
                  end;
              _Else_u ->
                  false
  