This is a problem that completely baffles us all in my workplace. We all have CS2 Creative Suite on the PC. Yet mine and my friends PC, when you open a smallest file size PDF, flatten it, reduce image size then go to save as a JPEG just will not let you do it. It comes up with program error. But this doesn't happen to all PDF files. Some will convert quite happily. Yet when my boss opens up the same file on his computer it works fine. This particular PDF does have a fith colour in it. Though I would have thought the flattening of it would eradicate that fith colour. I hope someone can help because this is a complete mystery to me