Acroread Error (not) Message

[Daniel J S. <dan...@ie...>]

I'm seeing the following error message when viewing Gnuplot generated 
PDF files:

This file may contain newer information than this viewer can support. It 
may not open or display correctly. Adobe recommends that you upgrade to 
the latest version of our Acrobat products. Please visit our product 
site at http://www.adobe.com/acrobat

The version is AcroRead 5.10.  I can't say when this started happening.  
I just recently upgraded my system, along with the version of acroread.  
However, I found this out through a collegue who may be running a 
slightly older version of AcroRead, say 5.6.

In any case, the contents of the file seem viewable.  Perhaps something 
wrong with the PDF library?  (Ethan?)  I think I just compiled the most 
recent version of PDFlib-Lite.  (PDFlib-6.0.1p1-Linux.tar.gz)  Either

1) PDF library does something acroread doesn't like.
2) PDF library isn't being called correctly to build a header
3) Acroread added an error message from 5.6 to 5.10 and complains where 
it used to not know the difference... and Acroread 7.0 can actually 
handle what is in PDF library, it's just that there's only a beta 
version of Acroread 7.0 just yet.

Dan