Running on a LEMP stack and can't figure out why automatic updates for Wordpress are failing. Everything is owned by www-data and insofar as I'm aware, the permissions for each directory/file are set appropriately.

Anyhow, anytime I click the button to "Update Now" I get the following:

Downloading update from http://wordpress.org/wordpress-3.5.1-partial-0.zip…

Unpacking the update…

Could not copy files.

Installation Failed

Any ideas on what I need to do in order to get automatic updates for Wordpress working?

Here are a couple of resources that have worked great for me:

http://jakebillo.com/wpfix-py-allow-you ... to-update/

http://yoast.com/fix-automatic-plugin-update/