--- twitter.module	2010-07-30 17:29:49.000000000 +0000
+++ twitter.module_changed	2010-07-30 17:30:08.000000000 +0000
@@ -262,9 +262,9 @@ function twitter_filter_tips($delta, $fo
  */
 function twitter_link_filter($text, $prefix = '@', $destination = 'http://twitter.com/') {
   $matches = array(
-    '/\>' . $prefix . '([a-z0-9_]{0,15})/i',
-    '/^' . $prefix . '([a-z0-9_]{0,15})/i',
-    '/(\s+)' . $prefix . '([a-z0-9_]{0,15})/i',
+    '/\>' . $prefix . '([a-z0-9_]+)/i',
+    '/^' . $prefix . '([a-z0-9_]+)/i',
+    '/(\s+)' . $prefix . '([a-z0-9_]+)/i',
   );
   $replacements = array(
     '><a href="' . $destination . '${1}">' . $prefix . '${1}</a>',