diff --git a/cache/classes/helper.php b/cache/classes/helper.php
index dfb3346bcfc..9a03556bad4 100644
--- a/cache/classes/helper.php
+++ b/cache/classes/helper.php
@@ -453,4 +453,19 @@ class cache_helper {
     public static function hash_key($key) {
         return crc32($key);
     }
+
+    /**
+     * Finds all definitions and updates them within the cache config file.
+     *
+     * @param bool $coreonly If set to true only core definitions will be updated.
+     */
+    public static function update_definitions($coreonly = false) {
+        global $CFG;
+        // Include locallib
+        require_once($CFG->dirroot.'/cache/locallib.php');
+        // First update definitions
+        cache_config_writer::update_definitions($coreonly);
+        // Second reset anything we have already initialised to ensure we're all up to date.
+        cache_factory::reset();
+    }
 }
\ No newline at end of file
diff --git a/cache/locallib.php b/cache/locallib.php
index 8b6c3ab6f8b..5b2d8aea2cf 100644
--- a/cache/locallib.php
+++ b/cache/locallib.php
@@ -364,18 +364,21 @@ class cache_config_writer extends cache_config {
      * Updates the definition in the configuration from those found in the cache files.
      *
      * Calls config_save further down, you should redirect immediately or asap after calling this method.
+     *
+     * @param bool $coreonly If set to true only core definitions will be updated.
      */
-    public static function update_definitions() {
+    public static function update_definitions($coreonly = false) {
         $config = self::instance();
-        $config->write_definitions_to_cache(self::locate_definitions());
+        $config->write_definitions_to_cache(self::locate_definitions($coreonly));
     }
 
     /**
      * Locates all of the definition files.
      *
+     * @param bool $coreonly If set to true only core definitions will be updated.
      * @return array
      */
-    protected static function locate_definitions() {
+    protected static function locate_definitions($coreonly = false) {
         global $CFG;
 
         $files = array();
@@ -383,12 +386,14 @@ class cache_config_writer extends cache_config {
             $files['core'] = $CFG->dirroot.'/lib/db/caches.php';
         }
 
-        $plugintypes = get_plugin_types();
-        foreach ($plugintypes as $type => $location) {
-            $plugins = get_plugin_list_with_file($type, 'db/caches.php');
-            foreach ($plugins as $plugin => $filepath) {
-                $component = clean_param($type.'_'.$plugin, PARAM_COMPONENT); // Standardised plugin name.
-                $files[$component] = $filepath;
+        if (!$coreonly) {
+            $plugintypes = get_plugin_types();
+            foreach ($plugintypes as $type => $location) {
+                $plugins = get_plugin_list_with_file($type, 'db/caches.php');
+                foreach ($plugins as $plugin => $filepath) {
+                    $component = clean_param($type.'_'.$plugin, PARAM_COMPONENT); // Standardised plugin name.
+                    $files[$component] = $filepath;
+                }
             }
         }
 
diff --git a/lib/upgradelib.php b/lib/upgradelib.php
index 149fc01fba9..7bd0d9793a8 100644
--- a/lib/upgradelib.php
+++ b/lib/upgradelib.php
@@ -1492,6 +1492,8 @@ function upgrade_core($version, $verbose) {
         external_update_descriptions('moodle');
         events_update_definition('moodle');
         message_update_providers('moodle');
+        // Update core definitions.
+        cache_helper::update_definitions(true);
 
         // Reset caches again, just to be sure
         purge_all_caches();
@@ -1525,6 +1527,7 @@ function upgrade_noncore($verbose) {
         foreach ($plugintypes as $type=>$location) {
             upgrade_plugins($type, 'print_upgrade_part_start', 'print_upgrade_part_end', $verbose);
         }
+        cache_helper::update_definitions();
     } catch (Exception $ex) {
         upgrade_handle_exception($ex);
     }
diff --git a/version.php b/version.php
index 4904073e6d7..b6cffad1e95 100644
--- a/version.php
+++ b/version.php
@@ -30,7 +30,7 @@
 defined('MOODLE_INTERNAL') || die();
 
 
-$version  = 2012110101.00;              // YYYYMMDD      = weekly release date of this DEV branch
+$version  = 2012110700.00;              // YYYYMMDD      = weekly release date of this DEV branch
                                         //         RR    = release increments - 00 in DEV branches
                                         //           .XX = incremental changes