#8 Undefined index in submit.php (url/title/captcha)

[Echt Einfach TV]

While running openLD for a couple of month I found the following entries in the error.log file:

PHP Notice: Undefined index: url in /submit.php on line 79
PHP Notice: Undefined index: title in /submit.php on line 88
PHP Notice: Undefined index: captcha in /submit.php(99) : eval()'d code on line 2

The errors/notices repeat frequently. Can anybody help?
Thanks

# I have not modified this file. So these are the responsible lines:
line 79: $_POST['url'] = remove_last_slash($_POST['url']);
line 88: $error->check_link_title($_POST['title'] = check_if_null($_POST['title']));
line 99: ($hook = get_hook('submit_input_control')) ? eval($hook) : null;