There are a multitude of cases involving technology companies and shenanigans with Goldman Sachs, including Marvell Technologies: http://dealbook.nytimes.com/2011/04/11/marvell-co-founders-s...
Everyone in finance who is not a fish knows this, but they still deal with Goldman, why? Because they're making more money than anyone else, so you still have better odds with them than anyone else.