The underwriting banks for the TXU buyout are thinking about ditching the deal, paying a $1 billion break-up fee, rather than be on the hook for $3.7 billion later. (That latter figure courtesy of the back-of-the-envelop work at Dealbreaker.) The deal will still likely go through, though. At least, that’s what I’ve read. Or rather, that’s what I was able to understand from what I read.