[Plugin: SEO SearchTerms Tagging 2] WordPress database error

I love this plugin! But the error_log is filling up with the following error. Any ideas?

[28-Sep-2010 05:58:49] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘ORDER BY meta_count DESC LIMIT 100′ at line 1 for query SELECT meta_value,meta_count FROM wp_2_stt2_meta WHERE post_id = ORDER BY meta_count DESC LIMIT 100; made by do_action_ref_array, call_user_func_array, wpr_poster, wpr_post, wpr_insertpost, wp_insert_post, do_action, call_user_func_array, yarpp_save_cache, yarpp_cache_enforce, yarpp_cache_keywords, post_body_keywords, apply_filters_if_white, call_user_func_array, pk_stt2_admin_content_filter, stt_terms_list, pk_stt2_db_get_search_terms

http://ww.wp.xz.cn/extend/plugins/searchterms-tagging-2/