The Bing Maps blog states that the "new" Bing Maps style will be implemented today.
1) am I just unlucky in trying this exactly as ESRI/Microsoft are changing the tiles over? (ie, does it work differently for you?)
2) if not, how can I force my users to download new Bing Maps tiles (but only once, allowing them to cache them hereafter)?
As luck would have it, I have a product launch scheduled for tomorrow so I'm hoping desperately that this problem will resolve itself overnight, Australian time...