I don't know if this is a bug in the current LuaTeX development version, but when trying to use Lua[La]TeX on W32TeX, the default 1in before both \hoffset and \voffset are missing, so my text is moved up to the left in all pages.
I'm using W32TeX, and I cannot reproduce the above. Are you making your format files yourself? In W32TeX, as in TeX Live, \pdfvariable horigin = 1 true in \pdfvariable vorigin = 1 true in \hoffset = 0pt \voffset = 0pt in distributed format files. -- Akira
