diff -ur drupal-6.x-dev/INSTALL.txt drupal-6.x-dev_new/INSTALL.txt
--- drupal-6.x-dev/INSTALL.txt	2007-07-26 02:14:14.000000000 -0400
+++ drupal-6.x-dev_new/INSTALL.txt	2007-07-29 13:09:20.693527864 -0400
@@ -102,6 +102,12 @@
    administrator account with total control. Login as the administrator and
    complete the initial configuration steps on the "Welcome" page.
 
+   If the default Drupal theme is not diplaying properly and links on the page
+   result in "Page Not Found" errors, try manually setting the $base_url variable
+   in the settings.php file if not already set. It's currently known that servers
+   running FastCGI can run into problems if the $base_url variable is left
+   commented out (see http://bugs.php.net/bug.php?id=19656).
+
    Consider creating a "files" subdirectory in your Drupal installation
    directory. This subdirectory stores files such as custom logos, user avatars,
    and other media associated with your new site. The sub-directory requires
diff -ur drupal-6.x-dev/sites/default/default.settings.php drupal-6.x-dev_new/sites/default/default.settings.php
--- drupal-6.x-dev/sites/default/default.settings.php	2007-06-17 06:45:35.000000000 -0400
+++ drupal-6.x-dev_new/sites/default/default.settings.php	2007-07-29 15:42:02.888578267 -0400
@@ -94,11 +94,19 @@
 $db_prefix = '';
 
 /**
- * Base URL (optional).
+ * Base URL (optional in most cases).
  *
- * If you are experiencing issues with different site domains,
- * uncomment the Base URL statement below (remove the leading hash sign)
- * and fill in the URL to your Drupal installation.
+ * Drupal makes an effort to figure out your site's base URL. However,
+ * in some circumstances it can't. In these cases, uncomment out the
+ * Base URL statement below (remove the leading hash sign) and fill in
+ * the URL to your Drupal installation.
+ *
+ * If you are experiencing issues with different site domains, or
+ * if your theme is not diplaying properly and links on the page result
+ * in "Page Not Found" errors, manually setting the $base_url variable
+ * may help. It's currently known that servers running FastCGI can run
+ * into problems if the $base_url variable is left commented out
+ * (see http://bugs.php.net/bug.php?id=19656).
  *
  * You might also want to force users to use a given domain.
  * See the .htaccess file for more information.
diff -ur drupal-6.x-dev/UPGRADE.txt drupal-6.x-dev_new/UPGRADE.txt
--- drupal-6.x-dev/UPGRADE.txt	2007-01-09 04:16:10.000000000 -0500
+++ drupal-6.x-dev_new/UPGRADE.txt	2007-07-29 15:42:02.888578267 -0400
@@ -49,6 +49,13 @@
 8.  Verify the new configuration file to make sure it has the
     latest and correct information.
 
+    When upgrading from Drupal 5.1 and earlier, it may be
+    necessary to manually set the $base_url variable in the
+    settings.php file if it is not already set. For example,
+    it's known that servers running FastCGI can run into
+    problems if the $base_url variable is left commented out
+    (see http://bugs.php.net/bug.php?id=19656).
+
 9.  Re-install contributed modules.
 
     Note: make sure the version of a module matches your