--- C:/Users/Niklas/Downloads/mantisbt-1.2.3/bugnote_add.php	Di 14. Sep 15:40:10 2010
+++ C:/Users/Niklas/Downloads/bugnote_add.php	Do 11. Nov 15:16:48 2010
@@ -36,7 +36,21 @@
 	$f_private		= gpc_get_bool( 'private' );
 	$f_time_tracking	= gpc_get_string( 'time_tracking', '0:00' );
 	$f_bugnote_text	= trim( gpc_get_string( 'bugnote_text', '' ) );
+	
+	// begin stone captcha check for anon user
+    if (current_user_is_anonymous())
+    {
+        $f_captcha = gpc_get_string( 'captcha', '' );
+        $f_public_key = gpc_get_int( 'public_key', '' );
+        $f_captcha = strtolower( trim( $f_captcha ) );
+        $t_key = strtolower( substr( md5( config_get( 'password_confirm_hash_magic_string' ) . $f_public_key ), 1, 5) );
 
+        if ( $t_key != $f_captcha ) {
+            trigger_error( ERROR_SIGNUP_NOT_MATCHING_CAPTCHA, ERROR );
+        }
+    }
+    // end of stone captcha check for anon user
+
 	$t_bug = bug_get( $f_bug_id, true );
 	if( $t_bug->project_id != helper_get_current_project() ) {
 		# in case the current project is not the same project of the bug we are viewing...