Hi I get the following warning message when logging into wp-admin when role scoper is activated. I also receive a very similar warning message when  WP-eCommerce is activated in combination with Role Scoper which refernces the same line numbers 861 862 in the wp-includes/functions.php file.

Warning: array_merge() [function.array-merge]: Argument #2 is not an array in /usr/www/users/thepenit/wp-content/plugins/thecartpress/TheCartPress.class.php on line 561

Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/thepenit/wp-content/plugins/thecartpress/TheCartPress.class.php:561) in /usr/www/users/thepenit/wp-includes/functions.php on line 861

Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/thepenit/wp-content/plugins/thecartpress/TheCartPress.class.php:561) in /usr/www/users/thepenit/wp-includes/functions.php on line 862 

I’m on Wordpress version 3.2.1

Role Scoper ver 1.3.46

TheCartPress ver 1.1.3

The version of WP e-Commerce I was using was 3.8.6.1

Once I start navigating away from the wp-admin landing page the warning message disappears.