We get around this prob this way: While still in Photoshop, add
a layer as a new background and fill with any color not appearing
in the subject- magenta or purple, for eg. Flatten and save that as
a jpeg with the same name (overwriting the old one). When you
refresh, you have an image with a perfectly flat pure purple or
magenta background rather than green- then it's just one click to
Of course, we save not only the psd file but also a copy of the
orig jpeg in case we have to go back and redo it.
Hope that makes sense (it's late in the day!).