DodgeForum.com - Code P0304 recurring

My 2011 Challenger's engine light came on about three months ago. Auto Zone checked the code to be P0304 and suggested a tune up would fix the problem. I had the Dodge Dealership do a tune up and they replaced the spark plugs. Three weeks later the engline light came back on error code of P0304 again. I took it to a local auto shop and they replaced the #5 ignition coil or coil pack. Three weeks later my engine light came on again - same code - P0304 - I checked it myself doing the ignition key dance from on-aux-on-aux-on.

Anyone have any clues as to whats going on with my car? I did notice these lights coming on after I was using the cruise control feature.