MacDraw Pro: Rotated Bitmaps Poor on B&W Mac Screen
This information was provided by Claris Corporation on 16 March 1998, and incorporated into Apple Computer's Tech Info Library.
Rotated pixmaps (color/grayscale bitmaps) saved from a color Macintosh and then opened on a black and white Macintosh, are not properly dithering on screen. There is no workaround. (MacDraw Pro 1.5 only)