a real minimal example with clear explanation is needed so that it can be traced (and we need to be sure the font is right)

I have postet a minexample already here: http://www.ntg.nl/pipermail/ntg-context/2014/077590.html There is a link to the used font, too. If you have problem to see the unicode (like in my mailer), then you can copy the symbol from pure html here: http://www.ntg.nl/pipermail/ntg-context/attachments/20140402/d24030dc/attach... You can see the outout, like it should be (screenshot from other programms outputs) here: http://www.ntg.nl/pipermail/ntg-context/attachments/20140402/d24030dc/attach... It is a very small and clear minexample in my view :) I do not know, if the font is valid, surely it may have some problems. But in this case other programs I tried (namely CorelDraw and MS Word) do not have any problems with this unicode-symbol. Help and fix would be great, as this symbol is the only one left in my list of hacks and workarounds to typeset the quran with ConTeXt. (Hacks etc. needed, because unfortunately there are no good arabic font, either free or commercial, which can be used for the massive needs of typesetting quran (thats why nearly all used qurans are still written by hand)). But if I can make it clearer, I will definitely try, because it is an important question for typessting quran with ConTeXt. Thanks! Huseyin