I tried to auto-install from 3.5 to 3.5.1 on a IIS7.5 server. I tried "Option 2." on the codex: http://codex.wordpress.org/Version_3.5.1
This did not work.
I tried this tip from http://www.satoritechsolutions.com/blog/urgent-do-not-upgrade-to-wordpress-3-5-on-iis/:
"In the file /wp-includes/class-http.php comment out lines 144 and 145, which look like the following:
if ( ! is_writable( dirname( $r['filename'] ) ) )
return new WP_Error( 'http_request_failed', __( 'Destination directory for..."
Does not work also, still the "Destination directory for file streaming does not exist" error.
The Codex says to manually install the 'Hotfix' plugin, but the Hotfix plugin itself does not yet mention it will fix the 3.5.1 upgrade...
Are there any other tips?