Index: application.php
===================================================================
--- application.php	(revision 13168)
+++ application.php	(working copy)
@@ -783,11 +783,11 @@
 		$serial_name = $pascal_case_prefix . (isset($id) ? 'IDSerial:' . $id : 'Serial');
 
 		if ($increment) {
-			if (defined('DEBUG_MODE') && DEBUG_MODE && $this->isDebugMode()) {
-				$this->Application->Debugger->appendHTML('Incrementing serial: <strong>' . $serial_name . '</strong>.');
-			}
+			if ($this->isCachingType(CACHING_TYPE_MEMORY)) {
+				if (defined('DEBUG_MODE') && DEBUG_MODE && $this->isDebugMode()) {
+					$this->Application->Debugger->appendHTML('Incrementing serial: <strong>' . $serial_name . '</strong>.');
+				}
 
-			if ($this->isCachingType(CACHING_TYPE_MEMORY)) {
 				$this->setCache($serial_name, (int)$this->getCache($serial_name) + 1);
 			}