I'm publishing a client's newsletter on their website using FlashPaper,
which I'm authoring in FreeHand and converting to FlashPaper through it's
Mac OS X print driver.

You can see what's happening here:

It seems to be related to the scaling of the image: at different sizes, the
problem becomes more or less pronounced. I'm surprised that I haven't seen
this reported before... but I wonder how extensively used FlashPaper is!

I have the most recent versions of all the software involved: FlashPaper
2.2283, Contribute 3, FreeHand 11.0.2, OS X 10.3.8