Doesn't seem to make use of IE9 HW acceleration

In running this on IE9, it appears that once the DOM starts loading a lot of objects, the spinner halts, just like an animated GIF. :(

I have seen some other spinners that do not halt during DOM loading (like spin.js in Chrome).

This is strange because supposedly IE9 uses the GPU for canvas operations; perhaps CanvasLoader just doesn't use those features that trigger GPU usage.
