You wouldn't be spending $60 to solve the problem, as PNW does so much more than just fixing the shoreline. I totally agree though that it should have been fixed ages ago as it really is a massive error and I'm very surprised that it's been ignored for so long.
I've seen this before, iirc does it not have something to do with the layering and library insertion points?
Sorry I can't be more elaborate but I am away from my pc atm.