Several years ago I attended a seminar administrated by the NJDCA (New Jersey's board for building codes). The speaker, an engineer, stated he actually specs the insulation be installed with the vapor barrier installed facing the crawlspace as thats where the moisture is located. My inspection yesterday had the same installation except it was foil faced. Here's my section of the report: "The insulation is installed with the vapor barrier facing the crawlspace. Although it goes against common building practices, some engineers and architects recommend this installation because it will prevent the crawlspace moisture from being absorbed into the insulation. Since I see no current problems, keep it as installed."