I really want to believe it has something to do with those projection nodes but without looking at the scene file I can't really say for sure, it could be the other machine was using prefs that didn't create projection nodes by default. Anyways, its good that you got that sorted. And you could try plugging the gloss map into the reflection gloss channel instead of the refraction gloss, this is more practical for a surface that isn't transparent and I'm assuming you want the surface smoothness to vary some.