When calling a standalone php script, the message

  <b>Warning</b>:  Cannot send session cache limiter - headers already sent in <b>
  Unknown</b> on line <b>0</b><br>

appears at the beginning of the output. 

First line of the script reads:

   #!/path/to/php -q

I tried to set 
 
  session.cache_limiter     = 
  session.cache_expire     =

or to '0' or 'disabled' with same result. Worked properly with Beta-3.