I performed the update as you instructed, and it looks like everything works … except my access to the ownCloud web interface. My ownCloud sync clients are connecting and syncing files with no problem, but when I try to access the web interface I just get white screens, regardless of the browser or URL I use (domain.com/owncloud/, domain.com/owncloud, domain.com/owncloud/index.php, etc). The owncloud.conf nginx config file does include the line
fastcgi_param SCRIPT_FILENAME $request_filename;