arranging pages with transpparency color

[Vit Zyka <vit.zyka@seznam.cz>]

Hi Hans and others,

there is a problem with arranging pages with transparency color. See code:
------------------
\setuppapersize[A5,landscape][A4]
\setuparranging[2TOPSIDE]

\setupcolors[state=start]
\definecolor[tcBlack][s=0, t=.5, a=normal]

\starttext
   \switchtobodyfont[20pt]
   \dorecurse{1}{Page \color[tcBlack]{\recurselevel}\page}%
   \dorecurse{4}{Page \recurselevel\page}%
\stoptext
--------------------
Acroread (win 6.0.1) is complaining on the resulting PDF obtaining by
   texexec --arrange
The message from AR is:
   There was an error reading a page. There was a problem processing a
   document(14).
 From a previous version of AR I obtained more informative message:
   Could not find extended graphic state name Tr1

Necessary conditions:
1) transparent color on at least one page
2) arranging pages on sheets
3) number of pages exceeds one sheet

Observation:
If do not use switch --arrange and compile the file two times the error 
does not occure. (But the result is not correct due to missing table of 
content etc.)
It seems to me the problem is with managing transparen resources from 
sheet to sheet.

Vit Zyka