Findbugs gives "Null pointer dereference of System.out", why?

I am using Java 1.7, Eclipse 3.7 with the FindBugs plugin from the marketplace. The example is as nice as heaven:

class Application
{
  public static void main( String[] args )
  {
    System.out.println( "Bla" );
  }
}

This message was not present in the past and the internal implementation was always in System:

public final static PrintStream out = null;

So Findbugs IS right, but did something change that the message occur now?