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Hello, the following PlainTeX document produces unexpected results while hyphenating the word "Streifzüge": -------------------------------------------------------------------- \hyphenation{Streif-zü-ge} Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge Streif\-zü\-ge \showhyphens{Streifzüge} \showhyphens{Streif\-zü\-ge} \bye -------------------------------------------------------------------- This is LuaTeX, Version snapshot-0.25.0-2008031419 (Web2C 7.5.6) (format=luatex 2008.3.14) 30 MAR 2008 22:29 **HyphenationProblem.tex (HyphenationProblem.tex Overfull \hbox (5.02353pt too wide) in paragraph at lines 5--9 \tenrm Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge Streifzüge| \hbox(6.94444+1.94444)x469.75499, glue set - 1.0, direction TLT .\tenrm S .\tenrm t .\tenrm r .\tenrm e .\tenrm i .etc. Underfull \hbox (badness 10000) in paragraph at lines 15--15 [][] \tenrm Streifzüge \hbox(6.94444+1.94444)x16383.99998, glue set 9793.94307, direction TLT [] Underfull \hbox (badness 10000) in paragraph at lines 17--17 [][] \tenrm Streif-zü-ge \hbox(6.94444+1.94444)x16383.99998, glue set 9793.94307, direction TLT [] [1] ) Output written on HyphenationProblem.dvi (1 page, 1052 bytes). -------------------------------------------------------------------- As you can see, I explicitly specify the hyphenation points for "Streifzüge", but for some reason LuaTeX does not hyphenate it automatically. Only when I specify the hyphenation points in the text, does the word get hyphenated. Am I doing something wrong? Jonathan