- Patch #7725 by Marius: fixed glitch in e-mail address validation code. A...

- Patch #7725 by Marius: fixed glitch in e-mail address validation code.  A subset of all e-mail addresses was rejected as valid.

includes/common.inc

@@ -596,7 +596,7 @@ function drupal_specialchars($input, $quotes = ENT_NOQUOTES) {
  */
 function valid_email_address($mail) {
   $user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
-  $domain = '(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]\.?)+';
+  $domain = '(?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.?)+';
   $ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
   $ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';