Standard text/html HTTP Content-Type was not cached, causing encoding issues...

Standard text/html HTTP Content-Type was not cached, causing encoding issues on some server configurations.

includes/common.inc

@@ -1312,7 +1312,7 @@ function truncate_utf8($string, $len) {
 set_error_handler("error_handler");
 
 // spit out the correct charset http header
-header("Content-Type: text/html; charset=utf-8");
+drupal_set_header("Content-Type: text/html; charset=utf-8");
 
 // initialize the _GET["q"] prior to loading the modules and invoking their 'init' hook:
 if (!empty($_GET["q"])) {