> pdfTeX warning: pdftex (file ugqb8r.1200pk): Pixel font file for
> font ugqb8r at 1200 dpi not found
this message is much more helpful than the original one.
But it will lead users to try to find pk files, which will cause just as
much if not more confusion. The real issue here is map files, but I
don't know how pdftex can determine that.