Here's some more on the accusation that Summers 'got her fired'. Looks like her employer fired her for criticizing the company, but it's not clear why Summers is being blamed for it, as he is scarcely mentioned in either article.
http://tpmmuckraker.talkingpointsmemo.com/2009/04/larry_summers_ignored_frightening_trading_practice.php
http://www.phatmath.com/Author.htm (Mack's blog)