How would you specifiy what postid was in there? $post[postid] is currently only filled with the post id when a post is being viewed.
I suppose you could find out where $post[postid] is being set (probably from a query in showthread.php, but I haven't checked), then do something like
PHP Code:
$GLOBALS[postid] = $post[postid]
But I'm not sure why you'd want to (or even if that would work)
Thanks,
Alan.