You are doing it right, but the method is performed so fast that you were not able to figure out if the cursor is busy in the process or not, if the image capture has any events like captureStart, complete etc., handle that event and removeAllCursors in that handler.
No, that method is not that fast - it delays for about 10 seconds. And so far I don't see available any event like captureStart for it.
I'm experiencing the same problem. ¿Did you solve it?
It happens as if it were no background image defined for the bussy cursor.
But I have seen that such image is defined in default.css inside framework.swc, so it should work...
let's be realistic. adobe is reinventing an OS on top of 3 or so OS's. They have 1/30 the resources of MSFT which took 20 years to perfect this stuff.
if it doesnt work move on. no boo hoo.