Hi,
I did as suggested:
- installed of acrobat 9 pro trial
- set the PDF printer as default printer
- changed from F_ApiSave to F_ApiSilentPrintDoc (there's another way to print?)

As for FrameMaker 7 and FDK 7 nothing changed.
It still crashes on the same page, depending on the show/hide pattern.
To be sure, this evening I'll try also with FrameMaker 8 and FDK 8, but...

Do you have other clues?
How can I survive to this?
There's a place where I can post the FrameMaker error or whatever to know something more about the possible causes of all this crashes?

Thanks alot,
n3u.