Hi, i just purchased an OKI ES3640a3 Digital Printer and cant get good results from anything in CS3. But CS2 is fine... Any one know the issue?

I am assuming this is a desktop laser printer?

If so, my guess is that you are getting bad results out of CS3 due to the color settings.

What are your RGB to CMYK settings set to? Try Adobe RGB instead of sRGB.

Also, check your driver for any quality setting differences.

What specifically are you having problems with, color, spot color simulation, image quality, noise, etc?

Background colours and text, images usually are great. Settings are all set to CMYK because its a big A3 Digital Printer. . . . . .

Background colors and text?

What specifically? What colors are they? Are they PMS colors or defined as spot colors?

Are their transparancy effects applied to them?