The presets we used to print to postscript in CS3 don't give the same results in CS6. How do we print int postscript in InDesign in CS6 to get high-resolution pdfs?
Is there something about your workflow that requrires printing to postscript? The generic advice on these forums is to use Export PDF instead.
If you can tell us what you expected, and what you got instead, we might be able to help you out. If you're printing PS from a print preset, it seems like a good idea to open up CS3 and look at what was in your old print presets to see if it is possible to recreate those presets in CS6.