[NTG-context] header labels

Hi all, I've just hit some rather interesting interaction. I wanted my sections numbered A. Title, B. Title etc. This works, unless I choose language [deo]. Here's a short test document that demonstrates the behavior: \mainlanguage[de] \setupsection[section][conversion=A] \setuplabeltext[section={{},{.~}}] \starttext \section{Number One} dummy \section{Number Two} dummy \section{Number Three} dummy \stoptext If you replace language[deo] with language[de], things work as expected. Any explanation for this behavior? Best Thomas