[Zope] FSSession problems...

Greetings, I'm using FSSession to store login details about visitors to our site. It is important that users only be able to see their own data (of course). Today, however, I find out that some mistakes have been happening. People are finding themselves logged in when they haven't yet, and others finding they're logged in as someone else. This is, obivously, a problem. I cannot see how this could be happening, since the Session ID is stored in a cookie, which should be unique to the client. I am using: Zope 2.1.6 on Solaris 2.7 FSSession 0.4.0 Have a better one, Curtis.