When I asked director Ron Howard to put a disclaimer in
"The Da Vinci Code," I was denounced for infringing on
the artistic rights of Sony. Yet when Sony released "The
Merchant of Venice," the movie opened with a disclaimer
noting the prevalence of anti-Semitism in 16th-century
Venice. In "A Beautiful Mind," a Ron Howard film, the
movie ended with a disclaimer noting that it differs from
the account afforded by the book of that name..."
http://www.catholicleague.org/sony-bends-for-n-f-l-not-catholics/