If you take a screen capture and then chop stuff out that you don't want the world to see. Doing this within GIMP by setting an alpha channel on the screen capture and then erasing the parts of the image that you want to obscure will still cause them to be printed.
If you view this image from Linux in Galeon 1.2.6 or Netscape/7.0 all looks fine however if you print the image from within these applications then the erased section prints as if it was never erased.
On windows the images obscure which is great but obviously the erased information is still in the sent image.
Vendor status:
The issue has been given Bug #97167.