The supposed catalyst for the collapse: antitrust star Sean Boland, who had been leading the talks on the Howrey side, pulling out of the deal. It has been rumored that he might take his team not to Winston but to Baker Botts (which has already absorbed other Howrey talent).
What we do know for certain is that the partner exodus from Howrey continues. Here is the latest confirmed news.
UPDATE: Various updates have been (and are still being) appended — after the jump….