diff --git a/interposer/interposer.c b/interposer/interposer.c
index a54022d..ba23c52 100644
--- a/interposer/interposer.c
+++ b/interposer/interposer.c
@@ -223,3 +223,25 @@ GtkPrintOperationResult gtk_print_operation_run(GtkPrintOperation* op, GtkPrintO
  return res;
 }
 
+
+void gtk_label_set_text_with_mnemonic(GtkLabel *label, const gchar *str)
+{
+ static void (*next_func)(GtkLabel *label, const gchar *str)=NULL;
+
+ if (next_func==NULL)
+   { /* Initialization */
+    char *msg;
+    printf("* wrapping label set text\n");
+    next_func=dlsym(RTLD_NEXT,"gtk_label_set_text_with_mnemonic");
+    if ((msg=dlerror())!=NULL)
+       printf("** dlopen failed : %s\n", msg);
+   }
+
+ if (g_strcmp0(str, "Report all errors for tracks (slower)")==0)
+    str="_Report all errors for tracks (slower)";
+ next_func(label, str);
+
+ printf("GTK:Label Set Text 2:%s\n", str);
+ fflush(stdout);
+}
+
diff --git a/interposer/libinterposer.so b/interposer/libinterposer.so
index 7959cd2..95fe80c 100755
Binary files a/interposer/libinterposer.so and b/interposer/libinterposer.so differ
diff --git a/src/pcbnew_do b/src/pcbnew_do
index 58d849d..b3e4ecf 100755
--- a/src/pcbnew_do
+++ b/src/pcbnew_do
@@ -475,7 +475,6 @@ def print_layers(cfg, id_pcbnew):
         # to just use the menu accelerators (removed on KiCad 6)
         print_dialog_keys = ['alt+f', 'p']
     if use_interposer:
-        # TODO: Not sure if worst the effort, is marginally faster and doesn't look to be more reliable
         return print_layers_i(cfg, id_pcbnew, print_dialog_keys)
     return print_layers_n(cfg, id_pcbnew, print_dialog_keys)
 
@@ -720,7 +719,7 @@ def run_drc_python(cfg):
         cfg.board.Save(cfg.input_file)
 
 
-def run_drc(cfg):
+def run_drc_n(cfg):
     if not cfg.ki5:
         run_drc_6_0(cfg)
     else:
@@ -738,6 +737,48 @@ def run_drc(cfg):
     exit_pcbnew(cfg)
 
 
+def run_drc_5_1_i(cfg):
+    open_dialog_i('DRC Control', ['key', 'alt+i', 'd'])
+    logger.info('Enable reporting all errors for tracks')
+    wait_point(cfg)
+    # Here we added a shortcut for "Report all errors for tracks (slower)"
+    xdotool(['key', 'alt+r', 'Tab', 'Tab', 'Tab', 'Tab'])
+    paste_output_file_i(cfg)
+    open_dialog_i('Disk File Report Completed', ['key', 'Return'])
+    wait_for_window('Report completed dialog', 'Disk File Report Completed')
+    wait_point(cfg)
+    xdotool(['key', 'Return'])
+    wait_for_window('DRC modal window', 'DRC Control')
+    logger.info('Closing the DRC dialog')
+    wait_point(cfg)
+    xdotool(['key', 'shift+Tab', 'Return'])
+    wait_pcbnew()
+
+
+def run_drc_i(cfg):
+    if not cfg.ki5:
+        run_drc_6_0_i(cfg)
+    else:
+        run_drc_5_1_i(cfg)
+    # Save the PCB
+    if cfg.save:
+        logger.info('Saving PCB')
+        wait_point(cfg)
+        os.rename(cfg.input_file, cfg.input_file + '-bak')
+        xdotool(['key', 'ctrl+s'])
+        logger.info('Wait for PCB file creation')
+        wait_point(cfg)
+        wait_for_file_created_by_process(cfg.pcbnew_pid, os.path.realpath(cfg.input_file))
+    # Exit
+    exit_pcbnew_i(cfg)
+
+
+def run_drc(cfg):
+    if use_interposer and cfg.ki5:
+        return run_drc_i(cfg)
+    return run_drc_n(cfg)
+
+
 def export_gencad(cfg):
     wait_point(cfg)
     if cfg.ki5:
@@ -1625,6 +1666,8 @@ def start_queue(cfg):
         It will collect all messages from the interposer. """
     logger.debug('Starting queue thread')
     cfg.kicad_q = Queue()
+    # Avoid crashes when KiCad 5 sends an invalid Unicode sequence
+    cfg.popen_obj.stdout.reconfigure(errors='ignore')
     cfg.kicad_t = Thread(target=enqueue_output, args=(cfg.popen_obj.stdout, cfg.kicad_q))
     cfg.kicad_t.daemon = True   # thread dies with the program
     cfg.kicad_t.start()
@@ -1906,8 +1949,7 @@ if __name__ == '__main__':
     else:
         os.environ['LD_PRELOAD'] = interposer_lib
         logger.debug('** Using interposer: '+interposer_lib)
-    use_interposer = interposer_lib and (args.command == '3d_view' or args.command == 'export_gencad' or
-                                         args.command == 'ipc_netlist' or args.command == 'export')
+    use_interposer = interposer_lib
     enable_interposer = (interposer_lib and args.interposer_sniff) or use_interposer
     #
     # Do all the work
diff --git a/tests/pcbnew/test_print_layers.py b/tests/pcbnew/test_print_layers.py
index cc490e1..5436025 100644
--- a/tests/pcbnew/test_print_layers.py
+++ b/tests/pcbnew/test_print_layers.py
@@ -137,7 +137,7 @@ def test_print_pcb_good_wm(test_dir):
 def test_print_pcb_refill(test_dir):
     ctx = context.TestContext(test_dir, 'Print_Refill', 'zone-refill')
     pdf = 'zone-refill.pdf'
-    cmd = [PROG, '-v', 'export', '-f', '--output_name', pdf]
+    cmd = [PROG, '-vvv', 'export', '-f', '--output_name', pdf]
     layers = ['F.Cu', 'B.Cu', 'Edge.Cuts']
     ctx.run(cmd, extra=layers)
     ctx.expect_out_file(pdf)