Airgas: Potato, potahto.

The Deal Prof has a run-down on the Airgas decision.  He has it about right: 

The signal this reversal sends is that it basically says don’t worry about the language of your contracts so long as everybody “knows” what it means.

Potato, potahto, tomato, tomahto. Let's call the whole thing off ...  But you know, for the life of me, I can't figure out what motivated the court to take this path with the decision. 

-bjmq