I've linked to the box score. Just highlight the black part to see the text.
The pitcher who got the loss came in and faced two batters. He walked one guy to load the bases with 1 out in the 10th. The next hitter laid down a squeeze bunt and San Francisco won. The loss should go to Little (who put the eventual winning run on first) and not Villar (who gave up the squeeze bunt). Is this a known issue?
http://jd44.8m.com/box643.html