In settings.php, you can define how long a cookie is good for. Once it expires, they must log in again. The standard setting is 3 weeks and 2 days, so they may not have an auto-reload -- they just aren't being bounced off. You can also set this to 0 and have the cookie get deleted when they close the browser.

Nancy

Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: Jarry

a few registered users on my web have some kind of
auto-reload tweak in web-browser, which forces them
to be "online" forewer. Is there any way to log them
off manually (as administrator)?

Or how could I prevent this behaviour?