ページの最後にtart uga_insert_html_once: headが表示される。

IE8やサファリでサイトを見るとFOOTER（ページの最後）後に
Start uga_insert_html_once: head, Footer hooked: HTML inserted: Location is HEAD Start uga_get_option: footer_hooked uga_options: array ( ‘version_sent’ => ‘1.6.0’, ‘advanced_config’ => true, ‘account_id’ => ‘UA-11524978-1’, ‘internal_domains’ => ‘k-scs.com’, ‘max_user_level’ => ‘8’, ‘prefix_ext_links’ => ‘/outgoing/’, ‘prefix_mail_links’ => ‘/mailto/’, ‘prefix_file_links’ => ‘/downloads/’, ‘track_extensions’ => ‘gif,jpg,jpeg,bmp,png,pdf,mp3,wav,phps,zip,gz,tar,rar,jar,exe,pps,ppt,xls,doc’, ‘enable_tracker’ => true, ‘filter_content’ => true, ‘filter_comments’ => true, ‘filter_comment_authors’ => true, ‘track_adm_pages’ => true, ‘track_ext_links’ => true, ‘track_mail_links’ => true, ‘track_files’ => true, ‘ignore_users’ => true, ‘debug’ => true, ‘check_updates’ => true, ‘footer_hooked’ => true, ) Ending uga_get_option: footer_hooked (1) End uga_insert_html Ending uga_wp_head_track: Start uga_filter: ・・・・・・・

が表示されます。
Firefoxでは表示されませんが、どうしてでしょう？