Apple on Friday re-released Security Update 2003-06-09, which was originally released on June 9, 2003.
The security update addressed a potential problem that arises when the Apple Filing Protocol, or AFP, is used to reshare a Network File System (NFS) mount. Also addressed in this update is a potential situation that causes LDAP bind authentication requests to be improperly sent when using Kerberos authentication.
Security Update 2003-06-09 2.0 apparently fixes a login problem where you had to hit the return key instead of the login button. The new update is available from Software Update.