Well this problem just occured, it never did it before. Whenever i try to send a Mass Mail or edit my Mail Settings i get this error on a blank page:

Warning: Unknown(): A session is active. You cannot change the session module's ini settings at this time. in Unknown on line 0

I noticed there were some other people that had this same problem but there is no solution. Im pretty sure the mails arn't getting sent either.

My php info can be seen here: http://evilkarma.mine.nu/phpinfo.php

Please help anyone

I've been experiencing this error as well (WAMP System). It _seems_ to appear randomly. I never had any problems with this error on my other two systems running XOOPS.