Hi Hans & all, Just update to 2005.01.31 for my tetex-2.99.11. I do step by step following minstall.pdf. A simple test with vietnamese utf-8 encoding shows me that a lot of characters were missing: \ahook \abrevehook \acircumflexhook \ocircumflexhook .... See the comparing page : http://nguyendai.org/pub/compare.html Pdflatex + Unicode package give me all characters correctly. The sources, PDF are available at http://nguyendai.org/pub/ I don't know if I'm wrong some things when updating context ? Thank you, Quy NGUYEN DAI