Hello I just updated wordpress release and I now get this warning:
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at ../wp-config.php:80) in ../plugins/wp-invoice/core/wpi_functions.php on line 1308
All the plugins are up to date and recent. I get this error only when I view and invoice.
Thank you for your time :)