That made it into 4.0.5.

Andrei Zmievski · Andrei Zmievski · commit 787e4cc0fef0 · 2001-04-20T16:56:55.000Z
diff --git a/NEWS b/NEWS
@@ -39,8 +39,6 @@ PHP 4.0                                                                    NEWS
   the specified callback. (Andrei)
 - Fixed all relevant array functions to avoid moving the internal array
   pointer during operations. (Andrei)
-- IMPORTANT: removed /F modifier handling from preg_replace(). Instead
-  one should use new preg_replace_callback() function. (Andrei)
 - Added mysql_unbuffered_query(), which is useful for very large result sets
   (Zeev)
 
