Noticed in apache error logs (see below). If the length of the message is longer than the maximum length, only send what will fit
Sep 16 20:07:28 10.0.2.193 apache2[28441]: PHP Warning: socket_sendto() [<a href='function.socket-sendto'>function.socket-sendto</a>]: unable to write to socket [90]: Message too long in /home/wikipedia/common/php-1.17-test/includes/GlobalFunctions.php on line 464
Sep 16 20:07:29 10.0.2.193 apache2[26511]: PHP Warning: socket_sendto() [<a href='function.socket-sendto'>function.socket-sendto</a>]: unable to write to socket [90]: Message too long in /home/wikipedia/common/php-1.17-test/includes/GlobalFunctions.php on line 464