Still troubleshooting but here's the likely players:
Adobe Acrobat 9 Standard
AutoCAD (2010, & 2011)
Window 7 or Vista
Konica Printer/Copier using PS or PCL drivers
A user will print out a PDF doc, either single page or larger document, and one or more full page images will shrink down to the size of a large postage stamp (1"x2"). It does not affect the whole document or text pages. Just images/drawings/pics and its consistent to the PDF created in-house or from a client.
Users can go into the advanced printer settings and check 'Print as image' for the affected page(s). It works but there's lots of grumbling due to increase print time and it just a pain.
It does not seem to be a scaling issue (I've tried various settings) and it doesn't happen with all PDFs. Though CAD drawings are affected most. The best I can come up with is a vector drawing issue. Maybe something happens when creating vector drawing in PDF? Since 'print as image' does correct the issue. Or even a print driver issue? I've experimented with all, but no luck yet.
Also, I've seen this issue off and on for over a year. But as users are being migrated to Win7 and CAD 2011, it's happening more often.
If you've seen this and figured it out, please share.