trait K { 
case class CC(name: String) 
}

object Foo extends K 
object Bar extends K

val b1 = Foo.CC("b") 
val b2 = Bar.CC("b")

b1 == b2 // false under 2.9, true under 2.10-RC5

def oldEq(that: Any) = that match { 
case K.this.CC(n) => n == this.name && that.asInstanceOf[K.this.CC].canEqual(this) 
case _ => false 
}

def newEq(that: Any) = that.isInstanceOf[K.this.CC] && { 
val f = that.asInstanceOf[K.this.CC] 
(f.name == this.name) && f.canEqual(this) 
}