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...ex to typeset, ppower4 to postprocess the pdf file to get some nice features. Once again, I don't think any of this is the root of the problem. It seems that the way R specifies colors for PDF figure elements and text has quite a bit of diversity in it, but you'd never notice it until you putthese PDFs onto a dark blue background in a document where "yellow" is the default document foreground color. What I've found is that, when the default page color is not white -- such as when it's dark blue, as is typical for laptop presentations -- the colors in an included pdf file g...