Version 4.0.2 comes with OpenSSL 0.9.8q security update and more stable handling of user lists in User Activation Wizard. 

CHANGES FROM VERSION 4.0.1

1. SECURITY UPDATE- OpenSSL 0.9.8q

See https://openssl-library.org/news/secadv/20101202.txt for more information

2. Update - Control Panel User Activation Wizard 2.0.2

Better handling of user lists for activation