It’s been two decades since the Indigo Girls launched their career with their independently released debut album, 1987’s Strange Fire. Now, after entertaining millions of fans with their 10 major-label studio albums (nine on Epic Records and one, 2006’s Despite Our Differences, on Hollywood Records), Emily Saliers and Amy Ray have come full circle with the independent release of their new 2-CD album, Poseidon And The Bitter Bug, on their new label IG Recordings, distributed through Vanguard Records.