Why does Pages print negative images?

In some cases Pages has been known to print images with inverted colours. All red colours may come out as green, for example.

There is one case in particular that has been identified:

• Printing on HP printer

and

• using Mac OS X 10.5.1 (Leopard)
  

and

• appending drop-shadows to a picture.

One way to fix the problem is to remove the shadows from the picture. Another is reportedly to print to PDF, open the PDF in Adobe Reader (not Preview!) or iPhoto, and print from there.

Hopefully Apple will correct this bug in future releases.