Hi Maddoc
I just went back to replay Coin Quest 17, and I'm horrified to say that the magic box syndrome does not work any more!
Before the Platinum upgrade, if you pushed a box into the water, an invisible box would appear at the left hand side (depending on certain conditions). So when you push the box to the right in this level, an invisible box would appear above the left hand water and you could push it in.
It doesn't work for me any more! Patrick must have fixed this glitch. I will PM him and see what he says.
I've noticed a couple of other people's old levels, which I could do before, will now no longer work.
I'll get back to you about this Maddoc. Sorry for any confusion.