Ad-minister plugin: Catchable fatal error

Ad-minister plugin: Catchable fatal error

Following the upgrade of WordPress to version 3.0 I noticed that there were some errors with the Ad-minister plugin, specifically on the main administration page (tools.php?page=ad-minister). The page was now displaying an error message: Catchable fatal error: Object of class WP_Error could not be converted to string in ***/***/***/wp-includes/functions.php on line 302 The error is