[NTG-context] cannot set "et al." to italic

Hi all, When using the bibltx module, I want to make the otherstext "et al." italic. I have tried \setupcite[authoryears][otherstext={\it et al.}] but no luck. After looking in to the mailing list archive, I find that the italic style seems have been made default for most recent bibliography modules(am I right?). I just want to do that in my setup, can I? Or, do I have to update my bibliography modules? Thanks, Roy