Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 21651)
+++ wp-admin/includes/schema.php	(working copy)
@@ -896,7 +896,7 @@
 		// @todo - network admins should have a method of editing the network siteurl (used for cookie hash)
 		'siteurl' => get_option( 'siteurl' ) . '/',
 		'add_new_users' => '0',
-		'upload_space_check_disabled' => '0',
+		'upload_space_check_disabled' => is_multisite() ? get_site_option( 'upload_space_check_disabled' ) : '1',
 		'subdomain_install' => intval( $subdomain_install ),
 		'global_terms_enabled' => global_terms_enabled() ? '1' : '0',
 		'initial_db_version' => get_option( 'initial_db_version' ),