My problem was discoloration at the tips of the collar. Jos A.Banks said they never had a prior complaint, but I don't believe them.
My dry cleaner said this is an industry known issue and they provided me with a copy of the Textile Analysis Bulletins (TABs) #382 which addresses the issue.
In short, some shirts have to much bonding material used during construction and the heat of an iron causes the darkening.
If you want a copy of what was given to me, drop me a private message and I will pass along.
Jos A. Banks was more than happy to exchange the shirt.