This doesn't seem to work, but what is really odd is that if I load a bitmap into the image just before I do that, it does work just fine. The code I use to do that looks like this:
//This works, so it isn't downstream from here....it's here not saving the right image!
Bitmap tmpBmp = BitmapFactory.decodeResource(getResources(), R.drawable.myapp_icon);
mBitmap = tmpBmp;
It's acting like it just doesn't see the drawing done on the canvas that I do like this: