> i tried to reproduce your issue but gave up because of the fact that
> it's unclear what (version) of the font is used ... you switched from 10
> to 09 and in 09 i see no 'big circular thing' so your version is
> different from the one i donwload ... so, i cannot even be certain that
> the font is okay ... so if you want to test:
>
> - make sure that you use fonts consistently
> - make sure we know where to get that version of the font
> - make sure that corel draw (or whatever) is using the same font

You are right, sorry to annoy you here, some chaos in my place ...

So, to clear all questions: for this min-example (which is at the moment 
my last unsolved problem with this font) I used this font: 
http://fonts.qurancomplex.gov.sa/download/UthmanicHafs1Ver09Font.zip

And yes, Corel Draw uses this font, too.

BUT: There might me some issue with this font relating this 
end-of-aya-symbol, independent from ConTeXt. See the attached JPG, which 
is the output of CorelDraw, if I input exactly the same arabic code, 
like in my example.
You see in the picture a different behaviour between the one-digit and 
two-digit numbers aswell. But it is a different behaviour from ConText, 
the symbol is used, but the brackets are not replaced.

Can you reproduce it now?
Thanks!

Huseyin