Index: sites/all/modules/cacherouter/engines/db.php
===================================================================
--- sites/all/modules/cacherouter/engines/db.php	(revision 1)
+++ sites/all/modules/cacherouter/engines/db.php	(working copy)
@@ -1,6 +1,6 @@
 <?php
 class dbCache extends Cache {
-  var $content = array();
+//  var $content = array();
   
   function page_fast_cache() {
     return FALSE;
@@ -8,11 +8,11 @@
   
   function get($key) {
     global $user;
-    
+
     // Load local cache for multiple hits per page.
-    if (isset($this->content[$key])) {
-      return $this->content[$key];
-    }
+//    if (isset($this->content[$key])) {
+//      return $this->content[$key];
+//    }
     
     // Handle garbage collection
     $this->gc();
@@ -44,16 +44,17 @@
           }
         }
       }
-      $this->content[$key] = $cache;
+//      $this->content[$key] = $cache;
+
       return $cache;
     }
     return 0;
   }
   
   function set($key, $value, $expire = CACHE_PERMANENT, $headers = NULL) {
-    unset($this->content[$key]);
+//    unset($this->content[$key]);
     $serialized = 0;
-    if (!is_string($value)) {
+    if (is_object($value) || is_array($value)) {
       $value = serialize($value);
       $serialized = 1;
     }
@@ -65,7 +66,7 @@
   }
   
   function delete($key) {
-    unset($this->content[$key]);
+//    unset($this->content[$key]);
     if (substr($key, -1, 1) == '*') {
       if ($key == '*') {
         db_query("DELETE FROM {". $this->name ."}");
@@ -82,7 +83,7 @@
 
   function flush($flush = '') {
     $flush = empty($flush) ? time() : $flush;
-    $this->content = array();
+//    $this->content = array();
     db_query("DELETE FROM {". $this->name ."} WHERE expire != %d AND expire < %d", CACHE_PERMANENT, $flush);
   }
   
@@ -91,7 +92,7 @@
     $cache_flush = variable_get('cache_flush', 0);
     if ($cache_flush && ($cache_flush + variable_get('cache_lifetime', 0) <= time())) {
       // Reset the variable immediately to prevent a meltdown in heavy load situations.
-      variable_set('cache_flush', 0);
+      variable_set('cache_flush_'. $table, 0);
       // Time to flush old cache data
       $this->flush($cache_flush);
     }