Starting with TeX Live 2010, the various formats, that directly
generate PDF, default to generating PDF 1.5. This is generally
a good thing, but it can lead to compatibility issues with some
older PDF viewers. This package changes the version of PDF
generated with formats (based on pdfTeX or LuaTeX in PDF mode),
back to 1.4 for documents that need to achieve maximal
compatibility with old viewers.
