[NTG-context] typing blocks & undesired blank

Hi all, I have a document with many block \starttyping ... \stoptyping. I see some time undesired blank after headers (chaper, section,... see the shot http://people.vnoss.org/~vnpenguin/pub/context/test/test.png). How I can avoid this bad layout ? Source test file : http://people.vnoss.org/~vnpenguin/pub/context/test/test.tex PDF: http://people.vnoss.org/~vnpenguin/pub/context/test/test.pdf Thank you in advance, -- http://vnoss.org Vietnamese Open Source Software Community