I'm running the new version but I haven't really ran into any issues with it as of yet.  The only time I run into deep iron with the Nox is if I have hit a spell where I've not dug anything in a while, and then I start trying to force signals; digging those that I'm pretty sure are bad, but there is just enough of a high tone coming thru every now and again that makes me curious.  It was that way with the first version and the newer one.   What I have noticed though is something pretty