Hello, Take the following PlainTeX example: --------------------------------------------------------- % \input hyphen % A \showhyphens{regarding} \bye --------------------------------------------------------- This results in: --------------------------------------------------------- This is LuaTeX, Version snapshot-0.28.0-2008070118 (Web2C 7.5.6) (hyphenOther.tex Underfull \hbox (badness 10000) in paragraph at lines 5--5 [][] \tenrm regarding ) (see the transcript file for additional information) No pages of output. Transcript written on hyphenOther.log. --------------------------------------------------------- When uncommenting line (A), the result is as follows: --------------------------------------------------------- This is LuaTeX, Version snapshot-0.28.0-2008070118 (Web2C 7.5.6) (hyphenOther.tex (/usr/local/teTeX/share/texmf.tetex/tex/generic/hyphen/hyphen.tex) Underfull \hbox (badness 10000) in paragraph at lines 5--5 [][] \tenrm re-gard-ing ) (see the transcript file for additional information) No pages of output. Transcript written on hyphenOther.log. --------------------------------------------------------- Compare with beta 0.27: --------------------------------------------------------- This is LuaTeX, Version snapshot-0.27.0-2008062418 (Web2C 7.5.6) (hyphenOther.tex Underfull \hbox (badness 10000) in paragraph at lines 5--5 [][] \tenrm re-gard-ing ) (see the transcript file for additional information) No pages of output. Transcript written on hyphenOther.log. --------------------------------------------------------- So it seems that hyphenation patterns are not dumped into the format file anymore. Incidentally, contrary to what the manual says in section 9.5, the format file is not compressed (or at least not all of it): When opening it with a text editor, the hyphenation patterns, when using beta 0.27, are contained as plain text. A quick test using Zip on the PlainTeX format file reduces its size from 356K to 288K. Another test with a format file of 34M (containing the 420,000-word list from the dehyph-exptl project as hyphenation exceptions) shows a reduction to ~26M. Jonathan