I'm a !@#$%*? You're a *&%$#@!
In a letter, Giles Coren excoriates the Times sub-editors for altering the last sentence of one his columns. The Sunday Times sub-editors respond to Giles with their own letter and wonder why he had to be so rude and profane.
Good points all around. Not quite a literary feud, but similar entertainment value.
On a related note, Chuck Klosterman is overjoyed by the Shaq-Kobe feud and mutual hatred.