In Edit>Colour Settings
Are these settings identical?
Is there a way, do you kow, to add the legacy Pantone books to ID?
When exporting the document however, despite using identical settings to export PDF files in the past, the exported PDFs turn out with a greener hue than the previous CS5 PDFs.
What PDF settings are you you using? It's possible that the color shift is happening when the PDF is output by the printer, or even on press if the printing conditions have changed.
Sorry, I should have read more closely. I didn't catch the directions for ID tacked in there along with the ones for Illustrator.
I may have to start drinking coffe or something.
The colour change applies to everything on the file - I haven't used any Pantone colours in the document. Perhaps this will help - I've attached a screen shot of a page section from both CS5 and CS6 exported files. You can
see the colour difference here on screen, notably on products like the Anzac biscuit there's a greener hue on the CS6 exported file where the CS5 exported file has a warmer hue. This colour difference is apparent on every screen we view it on and also in print. Regardless of what colour settings I alter when exporting, the same colour difference occurs in the exported file.
Did you check your color settings, as Eugene suggested inthe first reponse? Are they the same?
The InDesign background colors are unchanged so it looks like the images have a CMYK profile embedded that conflicts with the document's profile and in one case the profiles were honored and in the other they were ignored.
You can select one of the images and choose Object>Image Color Settings to see what profile is being used.
Looking up the settings, they say the following:
InDesign CS5: Unsynchronised "settings are not synchronised for consistent colour" (odd; CS5 version is where the file exported with accurate colours)
InDesign CS6: Synchronised "using the same colour settings for consistent colour management" (CS6 version exported with a colour change)
Another thing I've realised that might be an issue:
The product images are still in RGB format (supplied by the photographer), where everything else in the artwork is in CMYK format. I've run a test export where I've converted everything to CMYK and exported it to a PDF.
InDesign CS5: Same colours consistently on both PDFs with RGB images and with all CMYK images.
InDesign CS6: Green hue across PDF with RGB images in it, Correct colours in PDF with all CMYK images.
So is this where the problem lies? The CS6 software having Synchronised colour settings shows a colour change when RGB photos are exported to PDF?
Let me know your thoughts...
The colour change in the background isn't as obvious as in the product images, I suppose because it's a green with a little more green in it. However, I've just put a message earlier as I've done some tests with RGB and CMYK colours that might've conflicted so you could be right!