This is a bug in Q2A 1.0, not specifically related to Korean.
You can fix it by changing qa_self_html() in qa-index.php from this:
{
global $qa_rewritten, $qa_request;
$params=$_GET;
unset($params['qa-rewrite']);
return qa_path_html($qa_request, $params, null, $qa_rewritten);
}
... to this ...
{
global $qa_rewritten, $qa_request;
$params=$_GET;
unset($params['qa-rewrite']);
$requestparts=explode('/', $qa_request);
foreach ($requestparts as $index => $requestpart)
$requestparts[$index]=urlencode($requestpart);
$qa_request=implode('/', $requestparts);
return qa_path_html($qa_request, $params, null, $qa_rewritten);
}
Thanks for catching this bug! I'll release version 1.0.1 shortly with this fix (and any others that come up!)