Document Viewer can not open latest PDF?

Sat Jan 30 08:26:02 UTC 2010

2010/1/30 Chris Smart <mail at christophersmart.com>:
> PDF 1.4 is an open standard, but Adobe products tend to "extent" the
> standard which can make their PDFs incompatible with standards based
> readers. Most annoying..
>

Looks like PDF has been updated to 1.7, which is ISO standard 32000-1.
"http://www.iso.org/iso/pressrelease.htm?refid=Ref1141"

I guess free products don't yet support 1.7..

-c