I am using Ubuntu 12.04 with HP LaserJet Pro 400 color printer M451nw Some PDFs are not printed (it turns our empty sheets instead). When I go to Windows7 the same PDF prints correctly with the same printer. A recent example is "Ideals and Counter-Ideals ..." Henry J Steiner. v 66 , issue 5, 1538-1560, 2014. How can this be corrected? Thanks Don Parsons