Pathobserver on document.title - works in ff, not in chrome

[commonpike]

This may have been reported in a more cryptic way :-)

This code

var observer = new PathObserver(document, 'title');
observer.open(function(newValue, oldValue) {
    console.info(newValue,oldValue)
});

does nothing in chrome, which supports object.observe(), but works fine in firefox, using Platform.performMicrotaskCheckpoint();

That only happens to the document.title. Perhaps there is something special about the variable in Chrome ? It doesn't give any warnings (I know window.title would be refused by chrome, but that spawns a warning).