I have this Konica Minolta magicolor 2430 DL printer (how can I get out the firmware version?) and printing with your driver works fine, except there's an offset. I figured out how to "correct" this offset using the script at http://www.linuxprinting.org/download/printing/alignmargins.
However, the weird thing is that this offset is not always constant. It's diff
Forum: Konica Minolta magicolor 2430 DL