I tried with Opera 9.24 buid 8816 and IE 7.0.5730.11 with the same result for manage/pages.
I still believe there is something wrong with the edit-pages.php file. Maybe something todo with the $post_status_q and/or the $_GET[‘s’] variables?
The answer is: there are no custom fields defined in the page.
(again I found my page back by filtering the manage/pages list with a word form the title)