Is it possible my deskjet is too old and cant handle the new colour profiles of cs5? Although that doesnt explain why it prints colours fine from illustrator and photoshop.
if the PDF is tagged with an embeddedICC profie and displays correctly in Acrobat, most likely your PDF Source Profile is not being CONVERTED to the CORRECT SPECIFIC Print Profile (for your printer/paper/ink combination)
You need to look at where Acrobat sets up Source Profile> Print Profile
if you are caught on a deadline and can't figure Acrobat printing out, not to worry, do your proofing in Photoshop
as long as you have a 'calibrated' monitor, Photoshop will display color correctly (using the correct Source Profile) and "Soft Proof" your printer's recommended Printer Profile to doublecheck any gamut issues
just be sure to embed ICC profiles in your documents and make sure your people downstream use your embedded profile
No. But you might want to "duplicate" whatever Color Settings you used in CS3 in CS5. I didn't know there were "new" profiles in CS5. Instead of "PDFing" in Illustrator and/or Photoshop, try using Distiller and it's conversion settings where you have a little more control. In a case like this, it may be better to down-save to CS3 and use that to convert to PDF, since it prints better and you feel more confident. Again, something is creating a problem in CS5, I would look at your Color Settings. Sounds like a gamut clip in CS5.