Index: sites/default/settings.php
===================================================================
RCS file: /cvs/drupal/drupal/sites/default/settings.php,v
retrieving revision 1.41
diff -u -p -r1.41 settings.php
--- sites/default/settings.php	7 Feb 2007 10:58:31 -0000	1.41
+++ sites/default/settings.php	11 Feb 2007 01:47:55 -0000
@@ -137,8 +137,7 @@ ini_set('session.use_trans_sid',    0);
 ini_set('url_rewriter.tags',        '');
 
 /**
- * We try to set the correct cookie domain. If you are experiencing problems
- * try commenting out the code below or specifying the cookie domain by hand.
+ * We try to set the correct cookie domain.
  */
 if (isset($_SERVER['HTTP_HOST'])) {
   $domain = '.'. preg_replace('`^www.`', '', $_SERVER['HTTP_HOST']);
@@ -150,6 +149,17 @@ if (isset($_SERVER['HTTP_HOST'])) {
 }
 
 /**
+ * On some sites, multiple domains or subdomains may point to the same site.
+ * For instance, example.com may redirect to foo.example.com.  In that case, 
+ * the browser may confuse the cookies between the two domains, resulting in 
+ * an inability to log in.  In that case, uncomment the line below and set 
+ * it to the more generic domain name.  For instance, .example.com is more
+ * generic than .foo.example.com.  Remember the leading period on the domain
+ * name, even if you wouldn't type it in your browser.
+ */
+#ini_set('session.cookie_domain', '.example.com');
+
+/**
  * Variable overrides:
  *
  * To override specific entries in the 'variable' table for this site,