Ive been having this issue for a few weeks now and Ive hunted online and found nothing.
I use Indesign CS6 to create ads. The Images in these ads are .psd saved as CMYK or Grey Scale.
I save them as PDF's, and in Preview randomly the PDF preview wont contain a certain logo and some of the images will be in reverse (Negatives) not sure why. But when I open these files in Adobe Acrobat Pro they look normal.
This is an issue because when I send the files they will see them in this preview state and not see the whole file.....
Please Help 