VerifyError #1025 / default xml namespace

I’ve been having problems with what I think is the default xml namespace directive. I have created a simple example of the problem…

// TestClass.as

package {
    public class TestClass {
        private var _testVar:String;
        public function TestClass() {
            var testXML:XML = <node1 xmlns="http://www.testurl.com/"><node2><node3>some words of wisdom</node3></node2></node1>;
            default xml namespace = testXML.namespace("");
            _testVar = testXML.node2.node3;
        }
        public function get testVar():String {
            return _testVar;
        }        
    }
}

// Test.fla - frame 1

import TestClass;
var myTestClass:TestClass = new TestClass();
var someVar:String = myTestClass.testVar;
trace(someVar);

I get the following error…

verify TestClass/get testVar()
                        stack:
                        scope: [global Object$ TestClass$] 
                         locals: TestClass 
  0:getlocal0
                        stack: TestClass
                        scope: [global Object$ TestClass$] 
                         locals: TestClass 
  1:pushscope
                        stack:
                        scope: [global Object$ TestClass$] TestClass 
                         locals: TestClass 
  2:getlocal1
VerifyError: Error #1025: An invalid register 1 was accessed.
    at TestClass/get testVar()
    at Test_fla::MainTimeline/Test_fla::frame1()

However if I take out the default xml namespace directive, and use the following code, it works fine.

var testNS:Namespace = new Namespace(testXML.namespace(""));
_testVar = testXML.testNS::node2.testNS::node3;

Thoughts??? It’s driving me crazy. Thanks in advance…

levi