Problema com compatibilidade do Woocommerce 2.2

Claudio, depois que atualizei para a nova versão do Woocommerce ele começou a me retornar o seguinte log de erro:

[ Moderator note: please wrap code in backticks or use the code button. ]

12-18-2013 @ 12:38:15 - Requesting token for order # with the following data: <?xml version="1.0" encoding="utf-8" standalone="yes"?>
<checkout><currency>BRL</currency><reference><![CDATA[CURSOSTNH1-]]></reference><sender><name><![CDATA[ ]]></name><email><![CDATA[]]></email></sender><items/><extraAmount>0.00</extraAmount><maxUses>1</maxUses><maxAge>120</maxAge></checkout>

12-18-2013 @ 12:38:16 - Failed to generate the PagSeguro Payment Token: Array
(
    [headers] => Array
        (
            [date] => Wed, 18 Dec 2013 12:36:02 GMT
            [server] => Apache-Coyote/1.1
            [content-type] => application/xml;charset=ISO-8859-1
            [cache-control] => max-age=180
            [expires] => Wed, 18 Dec 2013 12:39:01 GMT
            [vary] => User-Agent
            [connection] => close
        )

    [body] => <?xml version="1.0" encoding="ISO-8859-1" standalone="yes"?><errors><error><code>11012</code><message>senderName invalid value:  </message></error><error><code>11024</code><message>Items invalid quantity.</message></error></errors>
    [response] => Array
        (
            [code] => 400
            [message] => Bad Request
        )

    [cookies] => Array
        (
        )

    [filename] =>
)

http://wordpress.org/plugins/woocommerce-pagseguro/