gPapers terms itself the "iTunes for PDFs" but it seems more of a "Rhythmbox for PDFs" (i.e. huge usability problems). I like jabref, but it doesn't have paper

gPapers terms itself the "iTunes for PDFs" but it seems more of a "Rhythmbox for PDFs" (i.e. huge usability problems). I like jabref, but it doesn't have papers' ability to grab a bibliographical entry for a PDF...