Hi there,

I have the following example with the font "traditional arabic", but the 
question is possibly independent from the font.
The code:

\definefont[Shehw][name:traditionalarabicnormal*arabic at 24pt] % or 
file:amiri-regular.ttf*... file:alq.ttf
\def\Arab[#1]{\noindentation \setupalign[r2l]\Shehw#1}
\starttext
\Arab[
اللَّـهِ
]\blank
\Arab[
اللهِ
]
\stoptext

(The lower one is the correct symbol, the upper one not.) If you can't 
compile, look at the attachment.
The upper one has the typographical correct symbol under it (below left, 
"kassra", looks like a slanted hyphen). This kassra has a nice distant 
from the word "Allah".

But the lower example, the correct "Allah", has a far too big distant 
from its kassra. Why? This does not happen e.g. in CorelDraw, where the 
distant is nice in both examples.

Huseyin