That did it. The background field is now filled in in Opera, and the new setting was saved when I submitted a move.
I had thought it was only the colors in shogi-simple.png that bothered me, but I think you're right about the thick borders. I'm currently using shogi-blue.png in one of my games; it's equally simple, but the more sedate colors and the thin borders are a vast improvement in my opinion.
I had thought it was only the colors in shogi-simple.png that bothered me, but I think you're right about the thick borders. I'm currently using shogi-blue.png in one of my games; it's equally simple, but the more sedate colors and the thin borders are a vast improvement in my opinion.