title: Problem with file permissions in Drupal 7
body: <p>So, I've copied the install tree of a site I'm developing to another machine. After updating settings.php to the proper db and base_path, and making sure that the file permissions for /sites/default/files/ are set to 755 (chmod -R 755 files), the file settings page (Configuration -> Media -> File System) insist that "The directory sites/default/files exists but is not writable and could not be made writable." I've experimented with 777 permissions to no avail. Any thoughts? </p>