weirdness in typechecking call on overloaded java method

Hi,

I've stumbled upon a typing issue I'm at a loss to explain. Following is a minimal test case:

---------------------------------------------
// ScalaMenuTest.scala
object ScalaMenuTest {
  def main(args: Array[String]): Unit = {
    val v = new javax.swing.JMenu()
    v.add(new javax.swing.JMenuItem())
    //v.add(new java.awt.PopupMenu());
  }
}

//==> compiling with scalac2 results in
//
// found   : javax.swing.JMenuItem
// required: java.awt.PopupMenu
//    v.add(new javax.swing.JMenuItem())
//          ^
//one error found
---------------------------------------------

As a sanity check, here is the equivalent Java code:

---------------------------------------------
// JavaMenuTest.java

class JavaMenuTest {
  public static void main(String[] args) {
    javax.swing.JMenu v = new javax.swing.JMenu();
    v.add(new javax.swing.JMenuItem());
   //v.add(new java.awt.PopupMenu());
  }
}
---------------------------------------------

I'd greatly appreciate if someone could verify; perhaps it's a
environment-related issue on my end?? If not, is it perhaps a compiler bug?
What I find truly bizarre is that if
the call adding a PopupMenu is uncommented, it then typechecks just
fine.

Many thanks,
Jason