voz,
Here's how I tie mine... Look at Matt's picture at the top of the page. I was shooting a 3d tourney today with one of Mathews' pro-staffers, and we got to talking about D-loops and he fell in love with the way this technique centers the release exactly behind the arrow... He said his release pulled up on his arrow and could possibly be causing nock pinch, which is one of the purposes of shooting this setup; it's supposed to remove that pinch. He was going home to retie his nocksets.
http://www.huntingnet.com/forum/tm.aspx?m=2042376&mpage=2&key=loop