re-injecting an element does not work with VML

[arian]

Re-injecting elements does not work in IE with VML, for example:

var art = new ART(300, 300).inject(document.id('myElement'));

var group = new ART.Group().inject(art);

var rect = new ART.Rectangle(100, 100).fill('red');
rect.inject(group);

rect.eject(group);
rect.inject(group);