There was a massive falling out, the gist of it if I remember correctly was that they lost steam due to TNS being lackadaisical, then TNS tried to release some of the tunes that he predominantly produced under his own name and Dan from NP somewhat justifiably became mad. My understanding is that while TNS did more of the heavy lifting on production, he is also a bit crazy (don't read his twitter) and probably not the best to work with.
This is just what I've heard through the grapevine from people who do personally know/work with Dan though so my view may be a bit skewed.