Firstly - my thanks & praise to the KiCad team for making a fantastic tool which more than rivals expensive (and even inexpensive) commercial offerings. Your footprint libraries in particular are easy to use & understand, bravo!
Anyway.... I finally got around to designing my first "real" PCB (that is, the first one I intend to actually make), and I've run into a bit of a weird problem, which I assume is down to me, but I can't for the life of me figure it out...
When I print my PCB foil front & back, some of the pads aren't black - they're a sort of dirty yellow... This shows up if I print to PDF or direct to the printer. If I choose black&white, the yellow pads print light grey...
Any idea what might be causing this?