Bug with gravity forms

Hi,
i noticed when you save parameters in /options-general.php?page=wp_plugin_encyclopedia for user roles. i get an error

PHP Warning: Attempt to modify property of non-object in /httpdocs/wp-content/plugins/gravityforms/common.php on line 1416
PHP Warning: Attempt to modify property of non-object in /httpdocs/wp-content/plugins/gravityforms/common.php on line 1420
PHP Warning: Attempt to modify property of non-object in /httpdocs/wp-content/plugins/gravityformspolls/plugin-upgrade.php on line 27
PHP Warning: Attempt to modify property of non-object in /httpdocs/wp-content/plugins/gravityformspolls/plugin-upgrade.php on line 31

http://wordpress.org/extend/plugins/encyclopedia/