diff --git a/desmume/src/gtk-glade/callbacks.c b/desmume/src/gtk-glade/callbacks.c
index 0479a685d..156aef2f5 100755
--- a/desmume/src/gtk-glade/callbacks.c
+++ b/desmume/src/gtk-glade/callbacks.c
@@ -133,15 +133,15 @@ void  on_menu_quit_activate    (GtkMenuItem *menuitem, gpointer user_data) { gtk
 
 /* MENU SAVES ***** ***** ***** ***** */
 void on_loadstateXX_activate (GtkMenuItem *m, gpointer d) {
-	int slot = dyn_CAST(int,d);
+	int slot = (int)d;
 	loadstate_slot(slot);
 }
 void on_savestateXX_activate (GtkMenuItem *m, gpointer d) {
-	int slot = dyn_CAST(int,d);
+	int slot = (int)d;
 	update_savestate(slot);
 }
 void on_savetypeXX_activate (GtkMenuItem *m, gpointer d) {
-	int type = dyn_CAST(int,d);
+	int type = (int)d;
 	desmume_savetype(type);
 }
 
@@ -167,7 +167,7 @@ void  on_menu_layers_activate (GtkMenuItem *menuitem, gpointer user_data) {
 
 /* SUBMENU FRAMESKIP ***** ***** ***** ***** */
 void  on_fsXX_activate  (GtkMenuItem *menuitem,gpointer user_data) {
-	Frameskip = dyn_CAST(int,user_data);
+	Frameskip = (int)user_data;
 //	printf ("setting FS %d %d\n", Frameskip, user_data);
 }
 
@@ -220,6 +220,7 @@ void rotate(float angle) {
 	resize(ScreenCoeff_Size[0],ScreenCoeff_Size[1]);
 }
 
+/* FIXME: Totally broken for 64bit; dyn_CAST won't work. */
 void  on_sizeXX_activate (GtkMenuItem *menuitem, gpointer user_data) {
 	float f = dyn_CAST(float,user_data);
 //	printf("setting ZOOM %f\n",f);
@@ -295,6 +296,7 @@ void  on_menu_rightscreen_activate  (GtkMenuItem *menuitem, gpointer user_data)
 	rightscreen(ScreenRight);
 }
 
+/* FIXME: Totally broken for 64bit; dyn_CAST won't work. */
 void  on_menu_rotatescreen_activate  (GtkMenuItem *menuitem, gpointer user_data) {
 	/* we want to rotate the screen */
 	float angle = dyn_CAST(float,user_data);
@@ -357,10 +359,10 @@ void change_bgx_layer(int layer, gboolean state, NDS_Screen scr) {
 	//fprintf(stderr,"Changed Layer %s to %d\n",layer,state);
 }
 void  on_wc_1_BGXX_toggled  (GtkToggleButton *togglebutton, gpointer user_data) {
-	int layer = dyn_CAST(int,user_data);
+	int layer = (int)user_data;
 	change_bgx_layer(layer, gtk_toggle_button_get_active(togglebutton), MainScreen);
 }
 void  on_wc_2_BGXX_toggled  (GtkToggleButton *togglebutton, gpointer user_data) {
-	int layer = dyn_CAST(int,user_data);
+	int layer = (int)user_data;
 	change_bgx_layer(layer, gtk_toggle_button_get_active(togglebutton), SubScreen);
 }
diff --git a/desmume/src/gtk-glade/callbacks_IO.c b/desmume/src/gtk-glade/callbacks_IO.c
index 31ef9913a..0eea9661f 100755
--- a/desmume/src/gtk-glade/callbacks_IO.c
+++ b/desmume/src/gtk-glade/callbacks_IO.c
@@ -170,11 +170,11 @@ gboolean screen (GtkWidget * widget, int off) {
 
 /* OUTPUT SCREENS  */
 gboolean  on_wDrawScreen_expose_event   (GtkWidget *widget, GdkEventExpose  *event, gpointer user_data) {
-	int scr = dyn_CAST(int,user_data);
+	int scr = (int)user_data;
 	return screen(widget, scr);
 }
 gboolean  on_wDrawScreen_configure_event(GtkWidget *widget, GdkEventConfigure *event, gpointer user_data) {
-	int scr = dyn_CAST(int,user_data);
+	int scr = (int)user_data;
 	reshape(widget, scr); return TRUE;
 }
 
@@ -203,7 +203,7 @@ static void resize_incremental(int i, GdkEventScroll *event) {
 }
 
 gboolean  on_wDrawScreen_scroll_event (GtkWidget *widget, GdkEvent *event, gpointer user_data) {
-	int scr = dyn_CAST(int,user_data);
+	int scr = (int)user_data;
 	// separate zoom factors not supported yet
 	scr = 0;
 	resize_incremental(scr,event);
@@ -225,7 +225,7 @@ void set_touch_pos (int x, int y) {
 }
 
 gboolean  on_wDrawScreen_button_press_event   (GtkWidget *widget, GdkEventButton  *event, gpointer user_data) {
-	int scr = dyn_CAST(int,user_data);
+	int scr = (int)user_data;
 	GdkModifierType state;
 	gint x,y;
 	
@@ -245,7 +245,7 @@ gboolean  on_wDrawScreen_button_press_event   (GtkWidget *widget, GdkEventButton
 }
 
 gboolean  on_wDrawScreen_button_release_event (GtkWidget *widget, GdkEventButton  *event, gpointer user_data) {
-	int scr = dyn_CAST(int,user_data);
+	int scr = (int)user_data;
 	if ((scr==1) ^ ScreenInvert) {
 		if (click) NDS_releasTouch();
 		click = FALSE;
@@ -254,7 +254,7 @@ gboolean  on_wDrawScreen_button_release_event (GtkWidget *widget, GdkEventButton
 }
 
 gboolean  on_wDrawScreen_motion_notify_event  (GtkWidget *widget, GdkEventMotion  *event, gpointer user_data) {
-	int scr = dyn_CAST(int,user_data);
+	int scr = (int)user_data;
 	GdkModifierType state;
 	gint x,y;