Romney and Associates were sued on more than one occasion for professional mismanagement and unjust enrichment. In the case involving Dade International it seems that there was enough evidence that Bain was denied some of the stock proceeds or something.
The article I read was short on details, but I thought I might be able to find more later this week.
"Unjust enrichment, is it? I thought that was the purview of The Daily Kos.