Tweet indicated by "trackback_permalink" has some text. Nevertheless "content" is empty.

[GoogleCodeExporter]

What steps will reproduce the problem?

1.
Access to the URL below.
http://otter.topsy.com/search.json?q=%E3%83%AD%E3%83%B3%E3%82%B0%E3%83%88%E3%83%
AC%E3%82%A4%E3%83%AB&maxtime=1367068860&mintime=1367068740&apikey=[Your API-Key]

2.
You will get response like [actual response] written bellow.
 -> "content" value of the response is empty.

3.
Access to the URL below which is contained in the response as 
"trackback_permalink"
http://twitter.com/hikermasa/status/328136687081373696

4.
The tweet has text. Nevertheless "content" of [actual response] is empty.

Doesn't "content" represent the text of tweet indicated by 
"trackback_permalink"?

What is the expected output? What do you see instead?
[expected response]
{
    "request": {
       ........
    }, 
    "response": {
        "hidden": 0, 
        "last_offset": 1, 
        "list": [
            {
                "content": "皆さんが、早めに紹介されておりましたので、タイミングをずらしてお知らせします。........", 
                ........
                ........
               "trackback_permalink": "http://twitter.com/hikermasa/status/328136687081373696", 
                "trackback_total": 1, 
                "url": "http://fb.me/2CxwUllgl"
            }
        ], 
       ........
    }
}

[actual response]
{
    "request": {
        "parameters": {
       ........
    }, 
    "response": {
        "hidden": 0, 
        "last_offset": 1, 
        "list": [
            {
                "content": "", 
                ........
                ........
                "trackback_permalink": "http://twitter.com/hikermasa/status/328136687081373696", 
                "trackback_total": 1, 
                "url": "http://fb.me/2CxwUllgl"
            }
        ], 
       ........
    }
}

What version of the product are you using? On what operating system?

Please provide any additional information below.
This phenomenon also occurs with other request condition.

Original issue reported on code.google.com by kobayas...@gmail.com on 1 May 2013 at 1:35