Thousand users collapse author select box

[mairav]

I have a site with 80.000 users, all of them are contributors.
When I go to create or edit a post or page, the 80.000 users are listed in the author select box, and I get this error:

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 1048576 bytes) in /home/maximo/public_html/wp-includes/wp-db.php on line 1151

I solved it for now editing the file wp-includes/user.php
I searched for SELECT {$wpdb->users}.* FROM $wpdb->users
And commented this lines:

//	if ( $include )
//		$query_where[] = "ID IN ($include)";

And inmediately added the line:

	$query_where[] = "ID IN (1)";

That made the error dissapear, but I can only select the admin user now.

How can I solve this? Is there any way the Create or Edit pages don't try to load the 80.000 users? For example, using a search box?

I was originally using the plugin Co-Authors Plus, but it seems to use the list generated by Wordpress, so I get the same error with or without that plugin.

Sincerely thanks.

[scribu]

This has already been partially addressed in #14572

Please upgrade to WP 3.1-RC and leave feedback there.