Index: wp-includes/widgets.php
===================================================================
--- wp-includes/widgets.php	(revision 5545)
+++ wp-includes/widgets.php	(working copy)
@@ -854,7 +854,7 @@
 			echo "<li><a class='rsswidget' href='$link' title='$desc'>$title</a>$summary</li>";
 		}
 	} else {
-		echo __('<li>An error has occured; the feed is probably down. Try again later.</li>');
+		echo '<li>'.__('An error has occured; the feed is probably down. Try again later.').'</li>';
 	}
 ?>
 			</ul>