Read the latest news about it here:

Ford Could Recall Quite a Few Trucks This Year - Ford Trucks

Here’s a list of the potentially affected vehicles:

2011-2012 F-250, F-350, F-450, and F-550 with the 6.7L V8 diesels.

 

Not really "new", the 6.7 forum has enough info about the egt sensor issue. Plus I think another sensor ion the early days had issues in Canada ( or cold places in the US) when temps got to -40.

Otherwise, the 6.7 seems to be doing really well.