Index: typo3/sysext/cms/tslib/showpic.php
===================================================================
--- typo3/sysext/cms/tslib/showpic.php	(revision 3674)
+++ typo3/sysext/cms/tslib/showpic.php	(working copy)
@@ -149,6 +149,7 @@
 		// ***********************
 			// If no file-param is given, we must exit
 		if (!$this->file)	{
+			header("HTTP/1.0 404 Not Found");
 			die('Parameter Error: No file given.');
 		}
 
@@ -164,6 +165,7 @@
 				$GLOBALS['TYPO3_CONF_VARS']['SYS']['encryptionKey'].'|');
 
 		if ($md5_value!=$this->md5) {
+			header("HTTP/1.0 404 Not Found");
 			die('Parameter Error: Wrong parameters sent.');
 		}
 
@@ -174,9 +176,11 @@
 
 		$test_file=PATH_site.$this->file;
 		if (!t3lib_div::validPathStr($test_file))	{
+			header("HTTP/1.0 404 Not Found");
 			die('Parameter Error: No valid filepath');
 		}
 		if (!@is_file($test_file))	{
+			header("HTTP/1.0 404 Not Found");
 			die('The given file was not found');
 		}
 	}
@@ -260,4 +264,4 @@
 $SOBE->init();
 $SOBE->main();
 $SOBE->printContent();
-?>
\ No newline at end of file
+?>