After further inquiries, i have found 2 Korean sources which coroborate the fact.
cine21.com : http://www.cine21.com/Movies/Mov_Movie/movie_detail.php?id=23559
lee byung hung fan site (see post dated August 30) : http://pandahunnie.wordpress.com/2009/08/30/icwtr-in-korea-this-october/
Hope Josh travels to Seoul to promote the movie. I like when he is interviewed to talk about his work and only his work.