diff -ur jack-rack-1.4.7-orig/src/midi_control.c jack-rack-1.4.7/src/midi_control.c
--- jack-rack-1.4.7-orig/src/midi_control.c	2007-11-18 13:13:49.000000000 +0000
+++ jack-rack-1.4.7/src/midi_control.c	2009-11-13 21:57:43.000000000 +0000
@@ -126,6 +126,9 @@
   midi_ctrl->min = 0.0;
   midi_ctrl->max = 1.0;
   
+  midi_ctrl->real_min = midi_ctrl->min;
+  midi_ctrl->real_max = midi_ctrl->max;
+  
   return midi_ctrl;
 }
 
@@ -141,6 +144,9 @@
   midi_ctrl->min = 0.0;
   midi_ctrl->max = 1.0;
   
+  midi_ctrl->real_min = midi_ctrl->min;
+  midi_ctrl->real_max = midi_ctrl->max;
+  
   return midi_ctrl;
 }
 
diff -ur jack-rack-1.4.7-orig/src/plugin_slot.c jack-rack-1.4.7/src/plugin_slot.c
--- jack-rack-1.4.7-orig/src/plugin_slot.c	2007-11-18 13:13:49.000000000 +0000
+++ jack-rack-1.4.7/src/plugin_slot.c	2009-11-13 22:03:20.000000000 +0000
@@ -514,6 +514,7 @@
         midi_control_set_midi_param   (new_midi_ctrl, midi_ctrl->midi_param);
         midi_control_set_min_value    (new_midi_ctrl, midi_ctrl->min);
         midi_control_set_max_value    (new_midi_ctrl, midi_ctrl->max);
+        midi_control_set_locked       (new_midi_ctrl, midi_ctrl->locked);
         
         plugin_slot_add_midi_control (plugin_slot, new_midi_ctrl);
         
@@ -558,6 +559,7 @@
     }
 
 
+  plugin_slot_remove_midi_controls (plugin_slot);
 
   /* kill all the control stuff */
   if (plugin_slot->control_table)
diff -ur jack-rack-1.4.7-orig/src/process.c jack-rack-1.4.7/src/process.c
--- jack-rack-1.4.7-orig/src/process.c	2007-11-18 13:13:49.000000000 +0000
+++ jack-rack-1.4.7/src/process.c	2009-11-14 09:55:57.000000000 +0000
@@ -425,6 +425,10 @@
   
   if (quitting)
     return 1;
+
+  /* no ports have been registered yet */
+  if (procinfo->port_count == 0)
+    return 0;
   
   process_control_port_messages (procinfo);
   
@@ -629,10 +633,6 @@
         return NULL;
   }
   
-  err = process_info_set_port_count (procinfo, ui, rack_channels);
-  if (err)
-        return NULL;
-  
   sample_rate = jack_get_sample_rate (procinfo->jack_client);
   buffer_size = jack_get_sample_rate (procinfo->jack_client);
   
@@ -644,6 +644,10 @@
   
   jack_activate (procinfo->jack_client);
 
+  err = process_info_set_port_count (procinfo, ui, rack_channels);
+  if (err)
+        return NULL;
+
 #ifdef HAVE_LASH
   /* sort out LASH stuff */
   lash_jack_client_name (global_lash_client, jack_client_name);