Akira Kurosawa - The Quiet Duel

I have 2 releases of this film. A region 1 release from Ronin and a region 4 release from Madman. The Ronin is the better of the 2 from my view. Both have rounded corners on the frames. The Madman also appears to have what might be frame sprockets on the right side. Has anybody got an explanation on how this might have occcurred? The chapter titles and breaks as well as the sub-title translations appear to be the same on both.

Madman 3