Since a few hours ago, whenever I or any of my users has logged in, they can browse the forums or something for about 1-2 pages and then the page they have entered will have them not logged in. It doesn't log them out, like the Log Out link does, rather it's like they closed the browser window (they still show up under Who's Online for a little bit). They are just no longer logged in. I should also mention that this makes it impossible for me to access the admin area. Can anyone tell me a remedy for this situation, or offer a suggestion? Thank you in advance.

After a fresh XOOPS install, it still is broken.

search the forums for "login loop" or something similar. there are a few threads out there. I found that when I went into the admin control panel, went to preferences and chose a custom session, this stopped my problem with being logged out. It had something to do with the cookies. GL.