Problem with Korean in messages

Hi.

While using openfire 3.6.3 + spark/pandion we have a problem in messages with Korean.

Sometimes characters in Korean are corruped.

Not a specific character but specific locations in messages, I think.

This problem is very similar with the one previously issued in the following articles

http://www.igniterealtime.org/community/message/171491

http://www.igniterealtime.org/community/thread/29250

http://www.igniterealtime.org/community/thread/29482

http://www.igniterealtime.org/community/message/162519

Have those problems been solved?

In my case, some characters are corrupted to ���.

Very similarly to http://www.igniterealtime.org/community/thread/29482

Could any one help me?

Plz.

Thanks.