Index: wp-admin/includes/class-wp-terms-list-table.php
===================================================================
--- wp-admin/includes/class-wp-terms-list-table.php	(revision 28046)
+++ wp-admin/includes/class-wp-terms-list-table.php	(working copy)
@@ -128,7 +128,11 @@
 			$columns['links'] = __( 'Links' );
 		} else {
 			$post_type_object = get_post_type_object( $this->screen->post_type );
-			$columns['posts'] = $post_type_object ? $post_type_object->labels->name : __( 'Posts' );
+			if ( $post_type_object ) {
+				$columns['posts'] = ( strlen( $post_type_object->labels->name ) > 5 ) ? __('#') : $post_type_object->labels->name;
+			} else {
+				$columns['posts'] = __( 'Posts' );
+			}
 		}
 
 		return $columns;