diff -up tcpdf/config/tcpdf_config_alt.php.patch tcpdf/config/tcpdf_config_alt.php
--- tcpdf/config/tcpdf_config_alt.php.patch	2013-05-09 11:34:19.817868752 +0200
+++ tcpdf/config/tcpdf_config_alt.php	2013-05-09 11:35:15.570865072 +0200
@@ -89,7 +89,7 @@ define ('K_PATH_FONTS', K_PATH_MAIN.'fon
 /**
  * cache directory for temporary files (full path)
  */
-define ('K_PATH_CACHE', K_PATH_MAIN.'cache/');
+define ('K_PATH_CACHE', '/var/cache/php-tcpdf/');
 
 /**
  * cache directory for temporary files (url path)
diff -up tcpdf/config/tcpdf_config.php.patch tcpdf/config/tcpdf_config.php
--- tcpdf/config/tcpdf_config.php.patch	2013-05-09 11:34:10.705869354 +0200
+++ tcpdf/config/tcpdf_config.php	2013-05-09 11:35:20.611864739 +0200
@@ -94,7 +94,7 @@ if (!defined('K_TCPDF_EXTERNAL_CONFIG'))
 	/**
 	 * cache directory for temporary files (full path)
 	 */
-	define ('K_PATH_CACHE', K_PATH_MAIN.'cache/');
+	define ('K_PATH_CACHE', '/var/cache/php-tcpdf/');
 
 	/**
 	 * cache directory for temporary files (url path)