Downloaded the B12 version from here:
Noticed that in the second section of this blog that the esri maps
returned an error on ArcGISMapServerImageryProvider ... failed to obtain
Also couldn't find any reference to what the esri image service needed
to be. Looking at the example this service is tiled and in projected
wgs 1984 web mercator (auxiliary sphere) coordinate system? Could the
esri image service be a dynamic map (not tiled) and in any coordinate
system (geographic wgs 1984)?