diff --git a/wp-includes/js/customize-preview-nav-menus.js b/wp-includes/js/customize-preview-nav-menus.js
index 2b6c9949fe..ce962d63f4 100644
--- a/wp-includes/js/customize-preview-nav-menus.js
+++ b/wp-includes/js/customize-preview-nav-menus.js
@@ -9,7 +9,6 @@ wp.customize.menusPreview = ( function( $, api ) {
 		renderNonceValue: null,
 		renderNoncePostKey: null,
 		previewCustomizeNonce: null,
-		previewReady: $.Deferred(),
 		requestUri: '/',
 		theme: {
 			active: false,
@@ -20,10 +19,9 @@ wp.customize.menusPreview = ( function( $, api ) {
 	};
 
 	api.bind( 'preview-ready', function() {
-		self.previewReady.resolve();
-	} );
-	self.previewReady.done( function() {
-		self.init();
+		api.preview.bind( 'active', function() {
+			self.init();
+		} );
 	} );
 
 	/**
@@ -36,26 +34,24 @@ wp.customize.menusPreview = ( function( $, api ) {
 			$.extend( self, _wpCustomizePreviewNavMenusExports );
 		}
 
-		self.previewReady.done( function() {
-			api.each( function( setting, id ) {
-				setting.id = id;
-				self.bindListener( setting );
-			} );
+		api.each( function( setting, id ) {
+			setting.id = id;
+			self.bindListener( setting );
+		} );
 
-			api.preview.bind( 'setting', function( args ) {
-				var id, value, setting;
-				args = args.slice();
-				id = args.shift();
-				value = args.shift();
-				if ( ! api.has( id ) ) {
-					// Currently customize-preview.js is not creating settings for dynamically-created settings in the pane; so we have to do it
-					setting = api.create( id, value ); // @todo This should be in core
-					setting.id = id;
-					if ( self.bindListener( setting ) ) {
-						setting.callbacks.fireWith( setting, [ setting(), setting() ] );
-					}
+		api.preview.bind( 'setting', function( args ) {
+			var id, value, setting;
+			args = args.slice();
+			id = args.shift();
+			value = args.shift();
+			if ( ! api.has( id ) ) {
+				// Currently customize-preview.js is not creating settings for dynamically-created settings in the pane; so we have to do it
+				setting = api.create( id, value ); // @todo This should be in core
+				setting.id = id;
+				if ( self.bindListener( setting ) ) {
+					setting.callbacks.fireWith( setting, [ setting(), null ] );
 				}
-			} );
+			}
 		} );
 	};
 
diff --git a/wp-includes/js/customize-preview-nav-menus.min.js b/wp-includes/js/customize-preview-nav-menus.min.js
index ad9382beb2..1bd2ee65e1 100644
--- a/wp-includes/js/customize-preview-nav-menus.min.js
+++ b/wp-includes/js/customize-preview-nav-menus.min.js
@@ -1 +1 @@
-wp.customize.menusPreview=function(a,b){"use strict";var c;return c={renderQueryVar:null,renderNonceValue:null,renderNoncePostKey:null,previewCustomizeNonce:null,previewReady:a.Deferred(),requestUri:"/",theme:{active:!1,stylesheet:""},navMenuInstanceArgs:{},refreshDebounceDelay:200},b.bind("preview-ready",function(){c.previewReady.resolve()}),c.previewReady.done(function(){c.init()}),c.init=function(){var c=this;"undefined"!=typeof _wpCustomizePreviewNavMenusExports&&a.extend(c,_wpCustomizePreviewNavMenusExports),c.previewReady.done(function(){b.each(function(a,b){a.id=b,c.bindListener(a)}),b.preview.bind("setting",function(a){var d,e,f;a=a.slice(),d=a.shift(),e=a.shift(),b.has(d)||(f=b.create(d,e),f.id=d,c.bindListener(f)&&f.callbacks.fireWith(f,[f(),f()]))})})},c.bindListener=function(a){var b,d;return(b=a.id.match(/^nav_menu\[(-?\d+)]$/))?(a.navMenuId=parseInt(b[1],10),a.bind(c.onChangeNavMenuSetting),!0):(b=a.id.match(/^nav_menu_item\[(-?\d+)]$/))?(a.navMenuItemId=parseInt(b[1],10),a.bind(c.onChangeNavMenuItemSetting),!0):(b=a.id.match(/^nav_menu_locations\[(.+?)]/),b?(d=b[1],a.bind(function(){c.refreshMenuLocation(d)}),!0):!1)},c.onChangeNavMenuSetting=function(){var a=this;if(!a.navMenuId)throw new Error("Expected navMenuId property to be set.");c.refreshMenu(a.navMenuId)},c.onChangeNavMenuItemSetting=function(a,b){!b||!b.nav_menu_term_id||a&&b.nav_menu_term_id===a.nav_menu_term_id||c.refreshMenu(b.nav_menu_term_id),a&&a.nav_menu_term_id&&c.refreshMenu(a.nav_menu_term_id)},c.refreshMenu=function(a){var c=this,d=[];b.each(function(b,c){var e=c.match(/^nav_menu_locations\[(.+?)]/);e&&a===b()&&d.push(e[1])}),_.each(c.navMenuInstanceArgs,function(b,e){(a===b.menu||-1!==_.indexOf(d,b.theme_location))&&c.refreshMenuInstanceDebounced(e)})},c.refreshMenuLocation=function(a){var d=!1;_.each(c.navMenuInstanceArgs,function(b,e){a===b.theme_location&&(c.refreshMenuInstanceDebounced(e),d=!0)}),d||b.preview.send("refresh")},c.refreshMenuInstance=function(c){var d,e,f,g,h,i,j=this;if(!j.navMenuInstanceArgs[c])throw new Error("unknown_instance_number");return i=j.navMenuInstanceArgs[c],f=a("#partial-refresh-menu-container-"+String(c)),i.can_partial_refresh&&0!==f.length?(d={nonce:j.previewCustomizeNonce,wp_customize:"on"},j.theme.active||(d.theme=j.theme.stylesheet),d[j.renderQueryVar]="1",e={},b.each(function(a,b){/^(nav_menu|nav_menu_locations)/.test(b)&&(e[b]=a.get())}),d.customized=JSON.stringify(e),d[j.renderNoncePostKey]=j.renderNonceValue,h=a.extend({},i),d.wp_nav_menu_args_hash=h.args_hash,delete h.args_hash,d.wp_nav_menu_args=JSON.stringify(h),f.addClass("customize-partial-refreshing"),g=wp.ajax.send(null,{data:d,url:j.requestUri}),g.done(function(b){var d;f.empty().append(a(b)),d={instanceNumber:c,wpNavArgs:h},a(document).trigger("customize-preview-menu-refreshed",[d])}),g.fail(function(){}),void g.always(function(){f.removeClass("customize-partial-refreshing")})):void b.preview.send("refresh")},c.currentRefreshMenuInstanceDebouncedCalls={},c.refreshMenuInstanceDebounced=function(a){c.currentRefreshMenuInstanceDebouncedCalls[a]&&clearTimeout(c.currentRefreshMenuInstanceDebouncedCalls[a]),c.currentRefreshMenuInstanceDebouncedCalls[a]=setTimeout(function(){c.refreshMenuInstance(a)},c.refreshDebounceDelay)},c}(jQuery,wp.customize);
\ No newline at end of file
+wp.customize.menusPreview=function(a,b){"use strict";var c;return c={renderQueryVar:null,renderNonceValue:null,renderNoncePostKey:null,previewCustomizeNonce:null,requestUri:"/",theme:{active:!1,stylesheet:""},navMenuInstanceArgs:{},refreshDebounceDelay:200},b.bind("preview-ready",function(){b.preview.bind("active",function(){c.init()})}),c.init=function(){var c=this;"undefined"!=typeof _wpCustomizePreviewNavMenusExports&&a.extend(c,_wpCustomizePreviewNavMenusExports),b.each(function(a,b){a.id=b,c.bindListener(a)}),b.preview.bind("setting",function(a){var d,e,f;a=a.slice(),d=a.shift(),e=a.shift(),b.has(d)||(f=b.create(d,e),f.id=d,c.bindListener(f)&&f.callbacks.fireWith(f,[f(),null]))})},c.bindListener=function(a){var b,d;return(b=a.id.match(/^nav_menu\[(-?\d+)]$/))?(a.navMenuId=parseInt(b[1],10),a.bind(c.onChangeNavMenuSetting),!0):(b=a.id.match(/^nav_menu_item\[(-?\d+)]$/))?(a.navMenuItemId=parseInt(b[1],10),a.bind(c.onChangeNavMenuItemSetting),!0):(b=a.id.match(/^nav_menu_locations\[(.+?)]/),b?(d=b[1],a.bind(function(){c.refreshMenuLocation(d)}),!0):!1)},c.onChangeNavMenuSetting=function(){var a=this;if(!a.navMenuId)throw new Error("Expected navMenuId property to be set.");c.refreshMenu(a.navMenuId)},c.onChangeNavMenuItemSetting=function(a,b){!b||!b.nav_menu_term_id||a&&b.nav_menu_term_id===a.nav_menu_term_id||c.refreshMenu(b.nav_menu_term_id),a&&a.nav_menu_term_id&&c.refreshMenu(a.nav_menu_term_id)},c.refreshMenu=function(a){var c=this,d=[];b.each(function(b,c){var e=c.match(/^nav_menu_locations\[(.+?)]/);e&&a===b()&&d.push(e[1])}),_.each(c.navMenuInstanceArgs,function(b,e){(a===b.menu||-1!==_.indexOf(d,b.theme_location))&&c.refreshMenuInstanceDebounced(e)})},c.refreshMenuLocation=function(a){var d=!1;_.each(c.navMenuInstanceArgs,function(b,e){a===b.theme_location&&(c.refreshMenuInstanceDebounced(e),d=!0)}),d||b.preview.send("refresh")},c.refreshMenuInstance=function(c){var d,e,f,g,h,i,j=this;if(!j.navMenuInstanceArgs[c])throw new Error("unknown_instance_number");return i=j.navMenuInstanceArgs[c],f=a("#partial-refresh-menu-container-"+String(c)),i.can_partial_refresh&&0!==f.length?(d={nonce:j.previewCustomizeNonce,wp_customize:"on"},j.theme.active||(d.theme=j.theme.stylesheet),d[j.renderQueryVar]="1",e={},b.each(function(a,b){/^(nav_menu|nav_menu_locations)/.test(b)&&(e[b]=a.get())}),d.customized=JSON.stringify(e),d[j.renderNoncePostKey]=j.renderNonceValue,h=a.extend({},i),d.wp_nav_menu_args_hash=h.args_hash,delete h.args_hash,d.wp_nav_menu_args=JSON.stringify(h),f.addClass("customize-partial-refreshing"),g=wp.ajax.send(null,{data:d,url:j.requestUri}),g.done(function(b){var d;f.empty().append(a(b)),d={instanceNumber:c,wpNavArgs:h},a(document).trigger("customize-preview-menu-refreshed",[d])}),g.fail(function(){}),void g.always(function(){f.removeClass("customize-partial-refreshing")})):void b.preview.send("refresh")},c.currentRefreshMenuInstanceDebouncedCalls={},c.refreshMenuInstanceDebounced=function(a){c.currentRefreshMenuInstanceDebouncedCalls[a]&&clearTimeout(c.currentRefreshMenuInstanceDebouncedCalls[a]),c.currentRefreshMenuInstanceDebouncedCalls[a]=setTimeout(function(){c.refreshMenuInstance(a)},c.refreshDebounceDelay)},c}(jQuery,wp.customize);
\ No newline at end of file
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 6a89221037..02c2b81c71 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-beta1-33133';
+$wp_version = '4.3-beta1-33134';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.