[wp-testers] Automatic upgrade still not working

[beanz]

I tried an automatic upgrade two days ago and it failed. I updated manually
without a hitch. I tried to upgrade automatically today and received the
following error message:

 Upgrade WordPress

Downloading update from
http://wordpress.org/nightly-builds/wordpress-latest.zip

Unpacking the core update

Could not copy file:
/public_html/wp-content/upgrade/core/wordpress/xmlrpc.php

Installation Failed

I am using development version (2.7-almost-beta-9300). Cool!