[jQuery] jquery.ifixpng.js IE 7 Transparency is Black instead of transparent

[cfdvlpr]

I'm just trying this nice jquery plugin and it works great to solve
some of my IE 6 PNG image problems.  But, in IE 7, the images are
black.  Has anyone else seen this and found a fix for it?  Is this a
problem specifically with PNG 24 alpha transparency?