Upgrading app from REE to 1.9.3

[ejab...@gmail.com]

Hello folks!

I'm trying to update my app. Before it was running on REE, I've installed 1.9.3, but now I have some issues with VCR.
As I read in the web, 1.8 ruby used syck to serialize yaml.

Now 1.9 uses psych. So, I'm passing serialize_with: :syck to VCR.use_cassette method, because my cassets were built with 1.8.

So, It reads my cassets, reads HTTP requests where content-type is HTML or plain text, but there is problem with json content-type.

One of requests recieves JSON, cassete has following property:

    body: 

      string: "[{\n\

        \"id\": 7997041,\n\

        \"received\": \"07.12.2012 13:56:32\",\n\

        \"phone\": \"SvyaznoyBnk\",\n\

        \"message\": \"Podtverdite vhod v Internet-bank. Vash odnorazoviy parol: 694557. Nikomu ne soobschaite etot parol, v tom chisle sotrudnikam banka.\",\n\

        \"to_phone\": \"79039062882\",\n\

        \"sent\": \"07.12.2012 13:56:28\"\n\

        }]"
But when VCR deserializes it, the response body is nil.

can you help, where can be a problem?