Hi Andrew,
I'm using a V4 printer profile with Snow Leopard and either LR3 or PSCS5 for printing. It's a profile I made with the Pulse Elite kit when I up-dated my 3800 firmware and driver to the latest versions. I'm using Ilford Gold Fibre Silk paper. There is absolutely no change in the color of the image surround on that paper in any of the prints I've made this way since I bought the Mac and started printing with it. Now, you're talking about a 3880 printer, whereas I'm on the 3800. I know these are very similar machines, but if we are both using the same OS and the same profile format and the same applications from which we print, is it possible that the version of the Epson driver for the 3880 could be the source of the problem?