Well, I can almost without a doubt tell you why you got that print, although I'm about 2 months late in answering!
You have a bitmap either embedded in the eps file, or its a raster image you're printing, and it has a transparency associated with the file.
I ran into this about 2 years ago with my xc-540, still have the print to remind me never, EVER, allow anything to be sent to the machine with a transparency! And especially a transparent bitmap within a powerclip in CorelDraw, that will for sure trash your printout every single time!
To determine what caused it, the print usually goes to s*#t right where the transparency starts. My rule of thumb is to make sure the raster image is flattened if outputting file from Photoshop, or in Coreldraw as an eps file, check every bitmap to make sure they are not transparent.
Chris