Index: modules/openid/openid.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/openid/openid.inc,v
retrieving revision 1.11
diff -u -r1.11 openid.inc
--- modules/openid/openid.inc	26 May 2008 17:12:55 -0000	1.11
+++ modules/openid/openid.inc	7 Jul 2008 18:24:56 -0000
@@ -446,21 +446,3 @@
   }
   return $data;
 }
-
-/**
- * Provide bcpowmod support for PHP4.
- */
-if (!function_exists('bcpowmod')) {
-  function bcpowmod($base, $exp, $mod) {
-    $square = bcmod($base, $mod);
-    $result = 1;
-    while (bccomp($exp, 0) > 0) {
-      if (bcmod($exp, 2)) {
-        $result = bcmod(bcmul($result, $square), $mod);
-      }
-      $square = bcmod(bcmul($square, $square), $mod);
-      $exp = bcdiv($exp, 2);
-    }
-    return $result;
-  }
-}
Index: includes/unicode.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/unicode.inc,v
retrieving revision 1.31
diff -u -r1.31 unicode.inc
--- includes/unicode.inc	18 Jun 2008 03:36:23 -0000	1.31
+++ includes/unicode.inc	7 Jul 2008 18:24:46 -0000
@@ -45,7 +45,7 @@
   // Check for outdated PCRE library
   // Note: we check if U+E2 is in the range U+E0 - U+E1. This test returns TRUE on old PCRE versions.
   if (preg_match('/[à-á]/u', 'â')) {
-    return array(UNICODE_ERROR, $t('The PCRE library in your PHP installation is outdated. This will cause problems when handling Unicode text. If you are running PHP 4.3.3 or higher, make sure you are using the PCRE library supplied by PHP. Please refer to the <a href="@url">PHP PCRE documentation</a> for more information.', array('@url' => 'http://www.php.net/pcre')));
+    return array(UNICODE_ERROR, $t('The PCRE library in your PHP installation is outdated. This will cause problems when handling Unicode text. Make sure you are using the PCRE library supplied by PHP. Please refer to the <a href="@url">PHP PCRE documentation</a> for more information.', array('@url' => 'http://www.php.net/pcre')));
   }
 
   // Check for mbstring extension
Index: modules/comment/comment.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/comment/comment.module,v
retrieving revision 1.642
diff -u -r1.642 comment.module
--- modules/comment/comment.module	3 Jul 2008 17:57:03 -0000	1.642
+++ modules/comment/comment.module	7 Jul 2008 18:24:50 -0000
@@ -1107,8 +1107,7 @@
   comment_invoke_comment($edit, 'validate');
 
   if (isset($edit['date'])) {
-    // As of PHP 5.1.0, strtotime returns FALSE upon failure instead of -1.
-    if (strtotime($edit['date']) <= 0) {
+    if (strtotime($edit['date']) === FALSE) {
       form_set_error('date', t('You have to specify a valid date.'));
     }
   }
Index: modules/node/node.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.module,v
retrieving revision 1.967
diff -u -r1.967 node.module
--- modules/node/node.module	26 May 2008 17:12:55 -0000	1.967
+++ modules/node/node.module	7 Jul 2008 18:24:56 -0000
@@ -828,8 +828,8 @@
       form_set_error('name', t('The username %name does not exist.', array('%name' => $node->name)));
     }
 
-    // Validate the "authored on" field. As of PHP 5.1.0, strtotime returns FALSE instead of -1 upon failure.
-    if (!empty($node->date) && strtotime($node->date) <= 0) {
+    // Validate the "authored on" field.
+    if (!empty($node->date) && strtotime($node->date) === FALSE) {
       form_set_error('date', t('You have to specify a valid date.'));
     }
   }