I am getting some strange error messages when I try and upload a LO today. Anybody else having problems?

Warning: session_start() [function.session-start]: open(/tmp/sess_9b6b53aa6de93c85cbf71c0cc10fd55f, O_RDWR) failed: Permission denied (13) in /home/forums/public_html/gallery/uploadphoto.php on line 16

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/forums/public_html/gallery/uploadphoto.php:16) in /home/forums/public_html/gallery/uploadphoto.php on line 16