Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
That looks a like ink starving issue for sure. But I think if memory serves correct when I had the same issue once it turned out to be a memory file size issue.One thing tho I notice you are printing a multi color in landscape mode, not sure if all printers are equal but my 1400 never held registration in landscape mode. my 1430 is even worse. If I were to print registration marks at the top and bottom of a SUPERB page the bottom regs will be off as much as a point.