Flickr Plugins Creates Text with error message.

I am using WordPress 2.2. I have SimpleFlickr installed on my blog. It works fine. The problem is that at the bottom of the blog and the admin page I have the following text:

Warning: Unknown(): open(/tmp/php-ses/sess_3b76b973a075d536400baf1175c4efbe, O_RDWR) failed: Permission denied (13) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp/php-ses) in Unknown on line 0

When I deactivate the plugin the message disappears. I have activated other plugins without this problem. Any suggestions? (I will also be leaving a comment on the plugin’s author’s page).

Thanks for the help.