I 've just auto-updated the plugin to the latest 4.4.3.2 version and I get these two warnings on EVERY page, both frontend and backend:
Warning: include_once(...../wp-content/plugins/like-button-plugin-for-wordpress/include/gb_template.php) [function.include-once]: failed to open stream: No such file or directory in ...../wp-content/plugins/like-button-plugin-for-wordpress/gb_fb-like-button.php on line 149
Warning: include_once() [function.include]: Failed opening '...../wp-content/plugins/like-button-plugin-for-wordpress/include/gb_template.php' for inclusion (include_path='.:/usr/lib64/php:/usr/lib/php') in ...../wp-content/plugins/like-button-plugin-for-wordpress/gb_fb-like-button.php on line 149