The following example (from the TeXbook source) works fine in dvi mode, but gives an error in pdf mode: \font\cmman=cmman \line{\cmman The\hfill T\kern-10pt\lower13pt\hbox{E}\kern-5pt Xbook} \bye And the error that I get when I run "luatex --output-format=pdf" (pdftex works fine though): This is LuaTeX, Version snapshot-0.28.0-2008063017 (Web2C 7.5.6) (t.tex [1{/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map}]kpathsea: Running mktexpk --mfmode / --bdpi 72 --mag 1+0/72 --dpi 72 cmman mktexpk: Mismatched mode ljfour and resolution 72; ignoring mode. mktexpk: Can't guess mode for 72 dpi devices. mktexpk: Use a config file or option to specify the mode; see: mktexpk: http://tug.org/texinfohtml/kpathsea.html#Unable-to-generate-fonts kpathsea: Appending font creation commands to missfont.log. ) luaTeX warning (file cmman): Font cmman at 72 not found Output written on t.pdf (1 page, 3199 bytes). Transcript written on t.log. Regards, Khaled -- Khaled Hosny Arabic localizer and member of Arabeyes.org team