I have never seen green with LPD. Maybe it is really old or the water is bad.
We go through a ridiculous amount here and it's usually very very fresh, and over the past 2 years I've seen hundreds of people print with it, some of which using their own distilled water. Never have I seen that green cast go away.
Now, it is somewhat subtle, and not often that noticeable, but if you put up a print from LPD next to say, something that went through ID-3, the difference is ridiculous and the green cast is unmistakable.
Not to mention, it makes my Oriental Warmtone look just orange.
It does have it's upsides though, like a ridiculously long life.
Richard, on the olive cast, I've tried a few things and am quite sure the Bromide is at fault for it, Liquid Orthazite seems to be a good replacement that removes that bit, though at the moment, I don't really have the time to mix my own paper developer. But I'm not trying to move these prints or anything, so it'll do, for now.