Doesn't work with replaced images using this.src

I tried to use PNG Behave! with an image menu in which the menu item image gets swapped out on mouseover and mouseout, but I would get non-transparent images in IE 6.

The mouseover and mouseout methods use bits of javascript that look like this.src = 'path/to/image'. According to the IEPNGFix pages, this method should work (as its demo demoes).

My problem was 'solved' by swapping out your .htc file for the most recent IEPNGFix one, taking care to preserve your path, but that means my customer now has to remember that they are using a patched module that they should never upgrade.

Since IEPNGFix promises that this.src should work, and it does not in your module, I consider this a critical failure.

I tried to figure out which of your changes caused the problem, but in the little time I had for this could not find it.