[Plugin: Footnotes for WordPress] Error message

Warning: Missing argument 1 for FootnotesForWordPress::discharge(), called in H:\xampplite\htdocs\wordpress\wp-content\plugins\footnotes-for-wordpress\wp-footnotes.php on line 101 and defined in H:\xampplite\htdocs\wordpress\wp-content\plugins\footnotes-for-wordpress\wp-footnotes.php on line 87

http://ww.wp.xz.cn/extend/plugins/footnotes-for-wordpress/