NetBeans IDE 7.0.1 (Build 201107282000)

Steps to reproduce: apply Change Method Parameter refactoring on the following program:

public class A {
  private int k() {
    return 1;
  }
  int m() {
    return k();
  }    
}
public class B extends A {
  int k() {
    return 2;
  }
  int test() {
    return m();
  }
}

Change Method Parameter refactoring introduces a behavioral change. In the previous program, the method test yields 1. In the following program, the method test yields 2 when an instance of B calls it.

public class A {
  int k() {
    return 1;
  }
  int m() {
    return k();
  }    
}
public class B extends A {
  int k() {
    return 2;
  }
  int test() {
    return m();
  }
}