I am using Mac OSX 10.6.8 and CS6 v 8.0. I have a 240 page book, yesterday 5 of the pages showed up as grey. They still had the correct text and photographs, though no page numbers. They seem to function OK, but an attempt to export to pdf said : "2 Problems (1 failure) were found with background tasks". A re-boot took things back to normal, but a couple of hours after, the same happened again. Puzzled. Les
thanks! It seems OK now. I have been working on a lot of old pictures in the book on Photoshop. I notice one doesn't seem to have the updated version I had saved (but not a major problem) Could there be a connection?