i am playing with the new implementation of the session handler.
The new defaultsetting let use the php session handler file do that. That's fine.

If you a defautl ezwebin installation and access the frontend the 1. time ( delete all cookies ), 2. , 3. time without login action a session_file in var/lib/php/sessions is created for every request.
These files are empty.
I think thats a bug - because you do not want craete a session file for every request see site.ini comment

## Backward compatibility settings:
# Makes session always start even if not needed (for anonymous users that just browse the site)
# by default it will not start before it is used
ForceStart=disabled

If you login as admin only 1 session file is created - that works.

(fedora 11, php 5.2.x, )