note 23630 added to function.header

I am sending the correct headers to stop browser caching as decribed in here, yet IE5.5 will still cache my pages. Netscape 4.7 and 6.0 behave correctly. What is so special about IE5.5 that I can seemingly not control caching from the PHP app? Has anybody else seen this? -- http://www.php.net/manual/en/function.header.php http://master.php.net/manage/user-notes.php?action=edit+23630 http://master.php.net/manage/user-notes.php?action=delete+23630 http://master.php.net/manage/user-notes.php?action=reject+23630