diff --git a/wp-admin/revision.php b/wp-admin/revision.php
index 9c3ce3630..8c712a531 100644
--- a/wp-admin/revision.php
+++ b/wp-admin/revision.php
@@ -9,6 +9,8 @@
 /** WordPress Administration Bootstrap */
 require_once('admin.php');
 
+wp_enqueue_script('list-revisions');
+
 wp_reset_vars(array('revision', 'left', 'right', 'diff', 'action'));
 $revision_id = absint($revision);
 $diff        = absint($diff);
diff --git a/wp-includes/js/wp-list-revisions.dev.js b/wp-includes/js/wp-list-revisions.dev.js
new file mode 100644
index 000000000..bb5c438a5
--- /dev/null
+++ b/wp-includes/js/wp-list-revisions.dev.js
@@ -0,0 +1,24 @@
+(function(w) {
+	var init = function() {
+		var pr = document.getElementById('post-revisions'),
+		inputs = pr ? pr.getElementsByTagName('input') : [];
+		pr.onclick = function() {
+			var i, checkCount = 0, side;
+			for ( i = 0; i < inputs.length; i++ ) {
+				checkCount += inputs[i].checked ? 1 : 0;
+				side = inputs[i].getAttribute('name');
+				if ( ! inputs[i].checked && 
+				( 'left' == side && 1 > checkCount || 'right' == side && 1 < checkCount && ( ! inputs[i-1] || ! inputs[i-1].checked ) ) &&
+				! ( inputs[i+1] && inputs[i+1].checked && 'right' == inputs[i+1].getAttribute('name') ) )
+					inputs[i].style.visibility = 'hidden';		
+				else if ( 'left' == side || 'right' == side )
+					inputs[i].style.visibility = 'visible';
+			}
+		}
+		pr.onclick();
+	}
+	if ( w && w.addEventListener ) 
+		w.addEventListener('load', init, false);
+	else if ( w && w.attachEvent )
+		w.attachEvent('onload', init);
+})(window);
diff --git a/wp-includes/js/wp-list-revisions.js b/wp-includes/js/wp-list-revisions.js
new file mode 100644
index 000000000..417572db4
--- /dev/null
+++ b/wp-includes/js/wp-list-revisions.js
@@ -0,0 +1 @@
+(function(a){var b=function(){var d=document.getElementById("post-revisions"),c=d?d.getElementsByTagName("input"):[];d.onclick=function(){var g,f=0,e;for(g=0;g<c.length;g++){f+=c[g].checked?1:0;e=c[g].getAttribute("name");if(!c[g].checked&&("left"==e&&1>f||"right"==e&&1<f&&(!c[g-1]||!c[g-1].checked))&&!(c[g+1]&&c[g+1].checked&&"right"==c[g+1].getAttribute("name"))){c[g].style.visibility="hidden"}else{if("left"==e||"right"==e){c[g].style.visibility="visible"}}}};d.onclick()};if(a&&a.addEventListener){a.addEventListener("load",b,false)}else{if(a&&a.attachEvent){a.attachEvent("onload",b)}}})(window);
\ No newline at end of file
diff --git a/wp-includes/post-template.php b/wp-includes/post-template.php
index 9b6efcdac..9f9673f59 100644
--- a/wp-includes/post-template.php
+++ b/wp-includes/post-template.php
@@ -1299,7 +1299,8 @@ function wp_list_post_revisions( $post_id = 0, $args = null ) {
 				$actions = '';
 
 			$rows .= "<tr$class>\n";
-			$rows .= "\t<th style='white-space: nowrap' scope='row'><input type='radio' name='left' value='$revision->ID'$left_checked /><input type='radio' name='right' value='$revision->ID'$right_checked /></th>\n";
+			$rows .= "\t<th style='white-space: nowrap' scope='row'><input type='radio' name='left' value='$revision->ID'$left_checked />\n";
+			$rows .= "\t<th style='white-space: nowrap' scope='row'><input type='radio' name='right' value='$revision->ID'$right_checked /></th>\n";
 			$rows .= "\t<td>$date</td>\n";
 			$rows .= "\t<td>$name</td>\n";
 			$rows .= "\t<td class='action-links'>$actions</td>\n";
@@ -1323,14 +1324,16 @@ function wp_list_post_revisions( $post_id = 0, $args = null ) {
 
 <br class="clear" />
 
-<table class="widefat post-revisions" cellspacing="0">
+<table class="widefat post-revisions" cellspacing="0" id="post-revisions">
+	<col />
 	<col />
 	<col style="width: 33%" />
 	<col style="width: 33%" />
 	<col style="width: 33%" />
 <thead>
 <tr>
-	<th scope="col"></th>
+	<th scope="col"><?php _e( 'Old' ); ?></th>
+	<th scope="col"><?php _e( 'New' ); ?></th>
 	<th scope="col"><?php _e( 'Date Created' ); ?></th>
 	<th scope="col"><?php _e( 'Author' ); ?></th>
 	<th scope="col" class="action-links"><?php _e( 'Actions' ); ?></th>
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index f17603b52..99332f92a 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -373,6 +373,8 @@ function wp_default_scripts( &$scripts ) {
 		$scripts->add( 'hoverIntent', "/wp-includes/js/hoverIntent$suffix.js", array('jquery'), '20090102' );
 		$scripts->add_data( 'hoverIntent', 'group', 1 );
 
+		$scripts->add( 'list-revisions', "/wp-includes/js/wp-list-revisions$suffix.js", null, '20091223' );
+
 		$scripts->add( 'media', "/wp-admin/js/media$suffix.js", array( 'jquery-ui-draggable' ), '20090415' );
 		$scripts->add_data( 'media', 'group', 1 );