php 4.0.6 Multi-Server Session Problems

Hi everyone. We have two webservers set up to be loadbalanced. As you could imagine that's a bit of a problem with sessions, but I figured out how to get around that. (actually that was kind of easy). You set up the php.ini to save the session files in a mutual drive. For example, we have a network attatched storage device mounted from both webservers. With the addition of --enable-trans-id and <form action=url?=SID> this seems to work flawlessly. But I upgraded from 4.0.4pl2 (I think) to 4.0.6 and now magically we're having several issues with sessions and specific clients. All Netscapes on the macOS, and ALL WIN95 clients can NOT log in. The functionality demonstrates the same traits as when a client does not have cookies enabled and tries to login, but we've worked with these people, they're settings are correct and everything SHOULD be a go, but it's not. Anyone have any ideas? I'm almost ready to revert back to 4.0.4 here! Justin