[Plugin: Simple Facebook Connect] SFC

I have some issue with SFC share counter, actually some time it works and another – do not.

I have tried to debug this issue, and here is what I found:

Plugin send request to facebook api, here example (with changed URL in request):

http://api.ak.facebook.com/restserver.php?v=1.0&method=fql.query&query=select%20url%2C%20total_count%20from%20link_stat%20where%20url%20in%20%28%27http%3A%2F%2Fwww.domain.com%2F%27%29&format=json

When change format from json to XML – some time it return correct response:
<link_stat>
<url>http://www.domain.com/</url&gt;
<total_count>4</total_count>
</link_stat>

But sometime I am getting error message:

<error_response>
<error_code>4</error_code>
<error_msg>Application request limit reached</error_msg>
…

Tried searching in facebook FAQ , found one named ‘Why is my application getting rate limited?’:
“To optimize the performance of our APIs and the applications that call them, we rate limit applications that make unoptimized queries, request data too frequently or generate a high number of requests without an access token. This minimizes the possibility for one application to negatively affect performance for other applications…”

I am not sure if it’s Ok and what can be done from server/website side
to prevent this from happening.

Please help.