In his article "No Gnus is Good Gnus" in the February 2002 Word Ways, Jim Puder showed what might have happened to some famous palindromes if their authors had been "suffering from the gnus", for example, A man, a pung, a gnu - Panama.
Word Ways: Vol. 35
, Article 10.
Available at: http://digitalcommons.butler.edu/wordways/vol35/iss3/10