Warning: ini_set() [function.ini-set]: A session is active. You cannot change the session module's ini settings at this time.
The hosting helpdesk gave me the following solutions:
1. Add an entry to the .htaccess
: "php_value session.auto_start off
this might give an internal server error as result. If so, undo the change and try solution 2:
2. Create a php.ini
file with the following content: "session.auto_start=Off
and copy this file in the main dir, install dir and admin dir (and I
guess in every dir that comes up with the session problem).
Solution 2 did solve the problem for me.
; Initialize session on request startup.
session.auto_start = 0