Bass Berry & Sims attorneys Joseph Crace and David Killion have written a few paragraphs catching us up with legal news from the world of mergers & acquisitions. The big idea to take away from 2012, they say, is that several courts began pushing back against the crush of lawsuits challenging just about every deal of note. Also of note when it comes to the pocketbook of corporate America is that some insurers selling director and officer liability coverage are hiking premiums and deductibles because merger litigation is no longer a remote risk.