Index: uuid.admin.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/uuid/Attic/uuid.admin.inc,v
retrieving revision 1.1.2.2
diff -u -p -r1.1.2.2 uuid.admin.inc
--- uuid.admin.inc	11 Jun 2009 18:07:13 -0000	1.1.2.2
+++ uuid.admin.inc	20 Jul 2009 10:12:59 -0000
@@ -56,13 +56,32 @@ function uuid_admin() {
  * Ensure all content and users have UUIDs, if they are supposed to.
  */
 function uuid_sync() {
+
+  // UUID() is non-deterministic and breaks with replication.
+  // To combat this we need to iterate through all items and statically set a uuid.
   if (variable_get('uuid_automatic_for_users', FALSE)) {
-    db_query("INSERT INTO {uuid_users} SELECT u.uid, UUID() FROM {users} AS u WHERE NOT EXISTS (SELECT uid FROM {uuid_users} WHERE uid = u.uid)");
+    $result = db_query("SELECT uid FROM {users} WHERE uid NOT IN (SELECT uid FROM {uuid_users})");
+    while($item = db_fetch_object($result)) {
+      db_query("INSERT INTO {uuid_users} (uid, uuid) VALUES(%d, '%s')", $item->uid, uuid_uuid());
+    }
   }
 
   foreach (variable_get('uuid_automatic_for_nodes', array()) as $type) {
-    db_query("INSERT INTO {uuid_node} SELECT n.nid, UUID() FROM {node} AS n WHERE n.type = '%s' AND NOT EXISTS (SELECT nid FROM {uuid_node} WHERE nid = n.nid)", $type);
-    db_query("INSERT INTO {uuid_node_revisions} SELECT nr.vid, UUID() FROM {node_revisions} AS nr INNER JOIN {node} n ON nr.nid = n.nid WHERE n.type = '%s' AND NOT EXISTS (SELECT vid FROM {uuid_node_revisions} WHERE vid = nr.vid)", $type);
+
+    // Slightly ugly, but it does save some queries for
+    // all the node types on which we don't want a UUID.
+    if ($type == '0')
+      continue;
+
+    $nid_result = db_query("SELECT nid FROM {node} WHERE type = '%s' AND nid NOT IN (SELECT nid FROM {uuid_node})", $type);
+    while ($item = db_fetch_object($nid_result)) {
+      db_query("INSERT INTO {uuid_node} (nid, uuid) VALUES(%d, '%s')", $item->nid, uuid_uuid());
+    }
+
+    $vid_result = db_query("SELECT nr.vid AS vid FROM {node_revisions} AS nr INNER JOIN {node} n ON nr.nid = n.nid WHERE n.type = '%s' AND nr.vid NOT IN(SELECT vid FROM {uuid_node_revisions})", $type);
+    while ($item = db_fetch_object($vid_result)) {
+      db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES(%d, '%s')", $item->vid, uuid_uuid());
+    }
   }
 
   drupal_set_message(t("UUID tables have been updated."));
Index: uuid.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/uuid/uuid.module,v
retrieving revision 1.1.2.4
diff -u -p -r1.1.2.4 uuid.module
--- uuid.module	11 Jun 2009 18:07:13 -0000	1.1.2.4
+++ uuid.module	20 Jul 2009 10:12:59 -0000
@@ -43,12 +43,12 @@ function uuid_nodeapi(&$node, $op, $teas
           db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, '%s')", $node->vid, $node->revision_uuid);
         }
         else {
-          db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, UUID())", $node->vid);
+          db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, '%s')", $node->vid, uuid_uuid());
         }
       }
       else if (in_array($node->type, $automatic_types)) {
-        db_query('INSERT INTO {uuid_node} (nid, uuid) VALUES (%d, UUID())', $node->nid);
-        db_query('INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, UUID())', $node->vid);
+        db_query("INSERT INTO {uuid_node} (nid, uuid) VALUES (%d, '%s')", $node->nid, uuid_uuid());
+        db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, '%s')", $node->vid, uuid_uuid());
       }
       break;
     case 'update':
@@ -57,7 +57,7 @@ function uuid_nodeapi(&$node, $op, $teas
           db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, '%s')", $node->vid, $node->revision_uuid);
         }
         else {
-          db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, UUID())", $node->vid);
+          db_query("INSERT INTO {uuid_node_revisions} (vid, uuid) VALUES (%d, '%s')", $node->vid, uuid_uuid());
         }
       }
       break;
@@ -163,6 +163,32 @@ function user_get_by_uuid($uuid) {
 }
 
 /**
+ * Returns a new formatted UUID string.
+ * Blatantly copied from http://php.net/manual/en/function.uniqid.php#65879
+ *
+ * @return $string
+ */
+function uuid_uuid() {
+
+  // If the function provided by the uuid pecl extension is available, use that.
+  if( function_exists("uuid_create")) {
+    return uuid_create(UUID_TYPE_DEFAULT);
+  }
+
+  // The field names refer to RFC 4122 section 4.1.2
+  return sprintf('%04x%04x-%04x-%03x4-%04x-%04x%04x%04x',
+    mt_rand(0, 65535), mt_rand(0, 65535), // 32 bits for "time_low"
+    mt_rand(0, 65535), // 16 bits for "time_mid"
+    mt_rand(0, 4095),  // 12 bits before the 0100 of (version) 4 for "time_hi_and_version"
+    bindec(substr_replace(sprintf('%016b', mt_rand(0, 65535)), '01', 6, 2)),
+      // 8 bits, the last two of which (positions 6 and 7) are 01, for "clk_seq_hi_res"
+      // (hence, the 2nd hex digit after the 3rd hyphen can only be 1, 5, 9 or d)
+      // 8 bits for "clk_seq_low"
+    mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535) // 48 bits for "node" 
+  );
+}
+
+/**
  * Determines if a UUID is valid.
  */
 function uuid_is_valid($uuid) {