I've got a remedy. Now the replayable board using kif2swf can be seen through Mozilla Firefox as well as IE. The problem Nicola pointed out a few days ago was caused by WYSIWYG-tag correcting function of Internet Explorer. Using Mozilla Firefox when uploading a blog content prevents it from unnecessary HTML correction.
In addition, Oujiminami, the creator of kif2swf, has kindly accepted my suggestion that both Kings on the replayable board should be Gyoku(玉）.
Anyway, here is the replayable board again. I hope everyone including Mozilla Firefox users can enjoy replaying the game on it.