Hello, when typesetting a document of mine using LuaTeX, I noticed that letterspacing seems not to work: LuaTeX runs mktexpk to create the letterspaced font and fails. pdfTeX simply extends the spacing of the base font. I created a small Plain-based example file which demonstrates the behaviour: ------------------------------- CUT --------------------------------- \pdfoutput1 \letterspacefont\ltenrm\tenrm10 \ltenrm This is a test. \tenrm This is a test. \bye ------------------------------- CUT --------------------------------- The log: ------------------------------- CUT --------------------------------- This is luaTeX, Version 3.141592-beta-0.10.2-2007081018 (Web2C 7.5.6) (LetterspaceFont.tex [1{/usr/local/teTeX/share/texmf.local/fonts/map/pdftex/upd map/pdftex.map}]kpathsea: Running mktexpk --mfmode / --bdpi 72 --mag 1+0/72 --dpi 72 cmr10+10ls mktexpk: don't know how to create bitmap font for cmr10+10ls. kpathsea: Appending font creation commands to missfont.log. ) luaTeX warning (file cmr10+10ls): Font cmr10+10ls at 72 not found Output written on LetterspaceFont.pdf (1 page, 5404 bytes). Transcript written on LetterspaceFont.log. ------------------------------- CUT --------------------------------- I have attached the resulting PDF; Acrobat 7 Mac displays a warning that some fonts were not found; Acrobat 8 Win simply uses Helvetica instead of the missing letterspaced font. It seems LuaTeX handles letterspacing like early versions of pdfTeX handle font expansion: By requiring an adjusted font file. Is this a bug? A feature? A reminder not to use letterspacing? ;-) Jonathan