There is bug in options.php (not options-general.php) which redirects to http://www.example.com/wp-admin/updated=true. That should redirect to http://www.example.com/wp-admin/options-general.php. I have already made its fix. You may have it at http://www.ishbir.com/wpfix1.zip. The fix was in the line
$goback = add_query_arg('updated', 'true', $_SERVER['HTTP_REFERER']);
Whereas, it had to be
$goback = add_query_arg('options-general.php?updated', 'true', $_SERVER['HTTP_REFERER']);
I have already fixed it to make it easier for you to search thousands of lines of code. Please include this fix in your next version of Wordpress.
Regards,
Ishbir Singh