This report from the Wall Street Journal Law Blog suggests that JP Morgan may have had to raise its buying price from $ 2 to $10 because of legal malpractice.  What was the legal malpractice?  A sentence inadvertently left in the agreement, which required JP Morgan to guarantee certain trades. 

Whether this is true or not, this Law blog sentence certainly sounds right: "M&A lawyering, remunerative though it may be, is a bit of a thankless job. If you do it well, and the deal goes off smoothly, perhaps you get a Lucite deal toy and a seat at the closing dinner, but no one really notices. But the moment there’s an un-dotted i or an un-crossed t, or if negotiations head south, then all eyes are on you: Must be the lawyers’ fault! "