Using WordPress 3.2.1 twentyten theme with WP_DEBUG set to true. I installed and activated plugin. Now, when I go to pages and then update any page I get warnings. When I deactivate plugin the warnings go away. When it's reactivated, warnings return. The plugin works fine in non-development mode when debugging is turned off.
Notice: add_option was called with an argument that is deprecated since version 2.3 with no alternative available. in xxxx/wp-includes/functions.php on line 3468
Warning: Cannot modify header information - headers already sent by (output started at xxxx/wp-includes/functions.php:3468) in xxxx/wp-includes/pluggable.php on line 934