diff --git a/Mixer/Controller_Module.C b/Mixer/Controller_Module.C
index 37f99ab..155c48c 100644
--- a/Mixer/Controller_Module.C
+++ b/Mixer/Controller_Module.C
@@ -60,7 +60,7 @@ Controller_Module::Controller_Module ( int W, int H, const char *L )
 
 Controller_Module::~Controller_Module ( )
 {
-
+    Fl::remove_timeout( update_cb, this );
 }
 
 
diff --git a/Mixer/Meter_Indicator_Module.C b/Mixer/Meter_Indicator_Module.C
index 546c59c..1555af3 100644
--- a/Mixer/Meter_Indicator_Module.C
+++ b/Mixer/Meter_Indicator_Module.C
@@ -65,6 +65,8 @@ Meter_Indicator_Module::~Meter_Indicator_Module ( )
 {
     if ( control_value )
         delete[] control_value;
+
+    Fl::remove_timeout( update_cb, this );
 }
 
 
diff --git a/Mixer/Meter_Module.C b/Mixer/Meter_Module.C
index e90cf64..f816b3a 100644
--- a/Mixer/Meter_Module.C
+++ b/Mixer/Meter_Module.C
@@ -63,6 +63,8 @@ Meter_Module::~Meter_Module ( )
 {
     if ( control_value )
         delete[] control_value;
+
+    Fl::remove_timeout( update_cb, this );
 }
 
 void
diff --git a/Mixer/Mixer_Strip.C b/Mixer/Mixer_Strip.C
index 2d07bf5..3011e78 100644
--- a/Mixer/Mixer_Strip.C
+++ b/Mixer/Mixer_Strip.C
@@ -296,6 +296,7 @@ Mixer_Strip::init ( )
                 o->color( FL_LIGHT1 );
                 o->selection_color( FL_RED );
                 o->labelsize(10);
+                o->when( FL_WHEN_RELEASE );
                 o->callback( ((Fl_Callback*)cb_handle), this );
             } // Fl_Button* o
             o->end();