From the Kansas City Star:

A 2007 report that the federal government had paid $1.1 billion in subsidies to dead farmers sparked an outcry and has been frequently cited by critics who considered the payments a blatant example of wasteful spending. But a follow-up that found no fraud and determined nearly all the subsidies paid on behalf of dead farmers in recent years were proper has received little attention.

According to the U.S. Department of Agriculture's Farm Service Agency, just a little over $1 million out of the billions of dollars paid in subsidies in 2009 went to estates or business entities that weren't entitled to them.

Review: Most payments to dead farmers are proper