xml-rpc-32700 error message

I’m developing a site locally with MAMP v.2.2 using the Twenty-thirteen theme. Jetpack was working fine until a few days ago. [Perhaps the disruption occurred when I upgraded from WP 3.7 to 3.7.1. Can’t recall exactly.] I want to create an image gallery using the carousel slide viewer in Jetpack, and use the custom CSS feature.

Here’s what I did to troubleshoot the problem:

1) I shut off all my plugins except Jetpack and tried to connect to the WP.com server. No luck. I received the error message above.

2) Switched to the Twenty-twelve theme and activated only the Jetpack plugin. Could not connect to WP.com, and returned the same error message.

3) Installed the Jetpack Compatibility TEST plugin and ran the test. Received the following report:

Site info

SITE_URL: http://jwjh.com
HOME_URL: http://jwjh.com

TEST: HTTP Connection
Array
(
[headers] => Array
(
[server] => nginx
[date] => Sun, 03 Nov 2013 02:32:56 GMT
[content-type] => text/plain;charset=utf-8
[connection] => close
[vary] => Cookie
[x-pingback] => http://jetpack.wordpress.com/xmlrpc.php
[expires] => Wed, 11 Jan 1984 05:00:00 GMT
[cache-control] => no-cache, must-revalidate, max-age=60
[pragma] => no-cache
[x-hacker] => Jetpack Test
)

[body] => OK
[response] => Array
(
[code] => 200
[message] => OK
)

[cookies] => Array
(
)

[filename] =>
)

TEST: HTTPS Connection
Array
(
[headers] => Array
(
[server] => nginx
[date] => Sun, 03 Nov 2013 02:32:56 GMT
[content-type] => text/plain;charset=utf-8
[connection] => close
[vary] => Cookie
[x-pingback] => https://jetpack.wordpress.com/xmlrpc.php
[expires] => Wed, 11 Jan 1984 05:00:00 GMT
[cache-control] => no-cache, must-revalidate, max-age=60
[pragma] => no-cache
[x-hacker] => Jetpack Test
)

[body] => OK
[response] => Array
(
[code] => 200
[message] => OK
)

[cookies] => Array
(
)

[filename] =>
)

TEST: Self Connection
Array
(
[headers] => Array
(
[date] => Sun, 03 Nov 2013 02:32:56 GMT
[server] => Apache/2.2.25 (Unix) mod_ssl/2.2.25 OpenSSL/0.9.8y DAV/2 PHP/5.5.3
[x-powered-by] => PHP/5.5.3
[content-length] => 42
[connection] => close
[content-type] => text/plain
)

[body] => XML-RPC server accepts POST requests only.
[response] => Array
(
[code] => 200
[message] => OK
)

[cookies] => Array
(
)

[filename] =>
)

4) Loaded the local xml-rpc.php file in my browser (Chrome v.30.0.1599.101) and received the message: 'XML-RPC server accepts POST requests only' on a line by itself. Attempts to reconnect to WP.com's server still failed and returned error message above.

I'm at a loss as to what to do.

http://wordpress.org/plugins/jetpack/