Yup, were already that way from the upgrade (which I'm amazed worked). Still not working. Cheers for trying to track this one down Trabis :)

Nope, didn't work I'm afraid, same thing - login seems fine but logs out as soon as you leave the home page.

Hi guys,

I've been playing around with a site on my own test server and it's been working fine, so I went ahead and uploaded it to my web hosting and now users won't stay logged in. You log in, it says 'Thank you for logging in' and redirects you back to the previous page, where the login box is there again. The only time it will briefly stay logged in is if you're on the main page, where you can see the user menu for one page before you click onto something else. It's the same for all users.

It may be related or might not be, but nothing seems to be being written to the cache folders (templates_c, cache etc) despite them being writable.

I'm beating my head against a wall with this one, anybody got any ideas? I've upgraded from 2.0.18 to 2.4.1 and it made no difference. Running on Apache with PHP 5.2.11 and MySQL 5.0.85.