Index: trunk/core/kernel/processors/main_processor.php
===================================================================
diff -u -N -r8860 -r8924
--- trunk/core/kernel/processors/main_processor.php	(.../main_processor.php)	(revision 8860)
+++ trunk/core/kernel/processors/main_processor.php	(.../main_processor.php)	(revision 8924)
@@ -1000,8 +1000,8 @@
 			$nextyear = intval(date('Y') + 1);
 
 			$format = "D, d M Y H:i:s";
-			$expiration = gmdate($format, gmmktime() + $params['cache']).' GMT';
-			$last_modified = gmmktime();
+			$expiration = gmdate($format, mktime() + $params['cache']).' GMT';
+			$last_modified = mktime();
 
 			header ('Cache-Control: public, cache, max-age='.$params['cache']);
 			header ("Expires: $expiration");
@@ -1013,7 +1013,7 @@
 			// Checking if the client is validating his cache and if it is current.
 			if (isset($headers['If-Modified-Since']) && (strtotime($headers['If-Modified-Since']) > $last_modified-$params['cache'])) {
 			   // Client's cache IS current, so we just respond '304 Not Modified'.
-			   header('Last-Modified: '.gmdate($format, strtotime($headers['If-Modified-Since'])).' GMT', true, 304);
+			   header('Last-Modified: '.date($format, strtotime($headers['If-Modified-Since'])).' GMT', true, 304);
 			   exit();
 			} else {
 			   // Image not cached or cache outdated, we respond '200 OK' and output the image.