diff --git a/admin/javascript/LeftAndMain.Preview.js b/admin/javascript/LeftAndMain.Preview.js
index ae3ed3d7d..2a8f04305 100644
--- a/admin/javascript/LeftAndMain.Preview.js
+++ b/admin/javascript/LeftAndMain.Preview.js
@@ -211,6 +211,7 @@
 			 */
 			_block: function() {
 				this.addClass('blocked');
+				this.find('.cms-preview-overlay').show();
 				return this;
 			},
 
@@ -219,6 +220,7 @@
 			 */
 			_unblock: function() {
 				this.removeClass('blocked');
+				this.find('.cms-preview-overlay').hide();
 				return this;
 			},
 
@@ -405,20 +407,6 @@
 			}
 		});
 		
-		/**
-		 * Update the "preview unavailable" overlay according to the class.
-		 */
-		$('.cms-preview.blocked').entwine({
-			onmatch: function() {
-				this.find('.cms-preview-overlay').show();
-				this._super();
-			},
-			onunmatch: function() {
-				this.find('.cms-preview-overlay').hide();
-				this._super();
-			}
-		});
-		
 		/**
 		 * "Preview state" functions.
 		 * -------------------------------------------------------------------