There are various standards for capitalization of titles. Lowercase "as" seems compliant with the current AP recommendations: "Capitalize the principal words,

There are various standards for capitalization of titles. Lowercase "as" seems compliant with the current AP recommendations: "Capitalize the principal words, including prepositions and conjunctions of four or more letters." http://writingexplained.org/ap-style/ap-style-composition-titles http://writingexplained.org/ap-style/ap-style-composition-ti... Could be a feature!