Index: src/wp-admin/includes/widgets.php
===================================================================
--- src/wp-admin/includes/widgets.php	(revision 26537)
+++ src/wp-admin/includes/widgets.php	(working copy)
@@ -71,14 +71,21 @@
 	$description = wp_sidebar_description( $sidebar );
 
 	echo '<div id="' . esc_attr( $sidebar ) . '" class="widgets-sortables">';
-
 	if ( $sidebar_name ) {
+		if( 'Inactive Widgets' != $sidebar_name ) {
 		?>
 		<div class="sidebar-name">
 			<div class="sidebar-name-arrow"><br /></div>
 			<h3><?php echo esc_html( $sidebar_name ); ?> <span class="spinner"></span></h3>
 		</div>
 		<?php
+		} else {
+		?>
+		<div>
+			<h3><?php echo esc_html( $sidebar_name ); ?> <span class="spinner"></span></h3>
+		</div>
+		<?php
+		}
 	}
 
 	echo '<div class="sidebar-description">';
Index: src/wp-admin/widgets.php
===================================================================
--- src/wp-admin/widgets.php	(revision 26537)
+++ src/wp-admin/widgets.php	(working copy)
@@ -350,7 +350,7 @@
 $theme_sidebars = array();
 foreach ( $wp_registered_sidebars as $sidebar => $registered_sidebar ) {
 	if ( false !== strpos( $registered_sidebar['class'], 'inactive-sidebar' ) || 'orphaned_widgets' == substr( $sidebar, 0, 16 ) ) {
-		$wrap_class = 'widgets-holder-wrap';
+		$wrap_class = ( $registered_sidebar['id'] == 'wp_inactive_widgets' ) ? '' : 'widgets-holder-wrap';
 		if ( !empty( $registered_sidebar['class'] ) )
 			$wrap_class .= ' ' . $registered_sidebar['class'];