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> I'm a little surprised that someone of your experience can so 
> readily arrive at conclusions, albeit the same as mine.
> Enfocus preflighting with the aberrant PDF file, using their 
> standard 'generic office' profile, gives no errors, though there is a
> caution against using unnecessarily high resolution for colour images.

I'm a little surprised (no let's not start that)
that a developer should think that a pre-flight
tool is the same thing as a PDF validator.

> Please can you recommend some other tool to pre-test PDF 
> files, other than Acrobat itself of course.

We'd all like one of them. I don't know of any.

Acrobat especially is not a PDF validator, but of course
is a reference implementation... and there have also
been bugs which have caused Acrobat to reject perfectly
good files. These are rarer, but possible. Mostly it
is developers who have stopped when they got a PDF file 
that seemed to work, rather than reading carefully the
specification in detail.

PDF creators essentially have to revisit their PDF
creation software and retest for each version of Acrobat
- and if they have a strategy for fixing a body of
broken files that's a bonus. 

It may be worthwhile sharing the file - on a web or FTP
site, please don't e-mail it either to the list or me!
Many people have looked long and hard at the inside of
faulty or Acrobat-upsetting files.

Aandi

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