[Plugin: WP Favorite Posts] Some errors after install

The following errors show up after activation of the plugin:

These show up on top of WP dashboard:
wp_register_widget_control (). in / var / www / sitename / wp-includes / functions.php on line 3467
Notice: register_sidebar_widget is deprecated since version 2.8! Use wp_register_sidebar_widget instead (). in / var / www / sitename / wp-includes / functions.php on line 3467
Notice: register_widget_control is deprecated since version 2.8! Use instead wp_register_widget_control (). in / var / www / sitename / wp-includes / functions.php on line 3467

These show up on top of Favorite Posts Configuration screen:
Notice: Undefined index: show_remove_link in /var/www/mytheme/wp-content/plugins/wp-favorite-posts/wpfp-admin.php on line 6
Notice: Undefined index: show_add_link in /var/www/mytheme/wp-content/plugins/wp-favorite-posts/wpfp-admin.php on line 7
Notice: Undefined index: opt_only_registered in /var/www/mytheme/wp-content/plugins/wp-favorite-posts/wpfp-admin.php on line 17
Notice: Undefined index: dont_load_js_file in /var/www/mytheme/wp-content/plugins/wp-favorite-posts/wpfp-admin.php on line 22
Notice: Undefined index: dont_load_css_file in /var/www/mytheme/wp-content/plugins/wp-favorite-posts/wpfp-admin.php on line 23

Any ideas?

Regards,
mtangazaji

http://wordpress.org/extend/plugins/wp-favorite-posts/