Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 18495)
+++ wp-admin/includes/schema.php	(working copy)
@@ -86,7 +86,7 @@
 ) $charset_collate;
 CREATE TABLE $wpdb->links (
   link_id bigint(20) unsigned NOT NULL auto_increment,
-  link_url varchar(255) NOT NULL default '',
+  link_url varchar(1024) NOT NULL default '',
   link_name varchar(255) NOT NULL default '',
   link_image varchar(255) NOT NULL default '',
   link_target varchar(25) NOT NULL default '',