Math symbols issue with context minimals distribution and

[Andrei Dragomir <adragomir@gmail.com>]

I am using context minimals, with the simpleslides module to 
make a presentation. 

I noticed that when typesetting math formulas, I get missing characters. 

I finally tracked it down to an issue (stupidity from me?) with the 
"context" executable.

I made a new file, with some example math markup, posted below
----------
\starttext

And this is some maths with PostScript fonts. 
\startformula
{a \over b} = {c \over d} \iff ad - bc = 0, 
\qquad \int_0^{2\pi}\!\!\! \sin^2(x)dx =\pi, 
\qquad {\rm e}^{{\rm i}\pi} + 1 = 0,
\qquad \sum_{k=1}^{\infty}{1 \over k^2} = {\pi^2 \over 6}.
\stopformula
Some ligatures: ffi, ffl. 

\stoptext
-----------

When running "context test_math.tex", in the output file I don't see the 
"\iff" symbol. When running "texexec test_math.tex", everything is working fine.

Any help would be appreciated, and sorry if this is a stupid question.

Thank you, 
  Andrei Dragomir

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________