If you open a high quality PDF in Acrobat, you can then go to ADVANCED> PDF Optimizer. Play with the settings to get what you need in terms of file size.
Save the file with a new name, e.g. oldfilename_a.pdf
Hope that helps. :)
On Sat, 9 Aug 2008, Geoff Thompson wrote:
> Dear All,
> I have been saving PDFs in Illustrator CS3 and Acrobat 8
> Professional. The files sizes are a lot bigger than if I print a similar
> file, containing the same images, as an Adobe PDF from Word. I have tried
> optimising the files but I lose a lot of quality in photos and the files are
> still a lot bigger than if they were made from a different program. My boss
> has my old CS creative suite and her version of Acrobat Professional has a
> function (I can't remember its name) that reduces file size without losing
> noticeable image quality. This is not available in my version and in any
> case was greyed out on a file made in Illustrator CS3.
> What am I doing wrong and what options do I have to get good quality images
> in a smaller file size?
> Geoff Thompson