Index: src/wp-admin/css/edit.css
===================================================================
--- src/wp-admin/css/edit.css	(revision 30790)
+++ src/wp-admin/css/edit.css	(working copy)
@@ -114,11 +114,17 @@
 
 #editable-post-name {
 	background-color: #fffbcc;
+	overflow: hidden;
+	max-width: 16em;
+	display: inline-block;
+	white-space: nowrap;
+	vertical-align: top;
+	text-overflow: ellipsis;
 }
 
 #editable-post-name input {
 	font-size: 13px;
-	height: 22px;
+	height: 24px;
 	margin: 0;
 	width: 16em;
 }
Index: src/wp-admin/includes/post.php
===================================================================
--- src/wp-admin/includes/post.php	(revision 30790)
+++ src/wp-admin/includes/post.php	(working copy)
@@ -1214,15 +1214,7 @@
 			$return .= '<span id="change-permalinks"><a href="options-permalink.php" class="button button-small" target="_blank">' . __('Change Permalinks') . "</a></span>\n";
 		}
 	} else {
-		if ( function_exists( 'mb_strlen' ) && mb_strlen( $post_name ) > 30 ) {
-			$post_name_abridged = mb_substr( $post_name, 0, 14 ) . '&hellip;' . mb_substr( $post_name, -14 );
-		} elseif ( strlen( $post_name ) > 30 ) {
-			$post_name_abridged = substr( $post_name, 0, 14 ) . '&hellip;' . substr( $post_name, -14 );
-		} else {
-			$post_name_abridged = $post_name;
-		}
-
-		$post_name_html = '<span id="editable-post-name" title="' . $title . '">' . $post_name_abridged . '</span>';
+		$post_name_html = '<span id="editable-post-name" title="' . $title . '">' . $post_name . '</span>';
 		$display_link = str_replace( array( '%pagename%', '%postname%' ), $post_name_html, urldecode( $permalink ) );
 
 		$return =  '<strong>' . __( 'Permalink:' ) . "</strong>\n";