I think I might be missing a trick here, but if I'm reading other posts right css3pie enables png fixing for ie?
I noticed that when I tried to use belated_PNG, css3pie seemed to cancel it out, so I looked about here and saw that it was able to fix png's too. However when I apply the behaviour to either img directly or a div using a png background, nothing seems to happen?

I have everything else working such as rounded corners, shadows and what have you, so a bit confused about what I'm doing wrong that's making png's display incorrectly regardless.

Halp!

Yes PIE does have some PNG-correcting capabilities, but:

1) It won't work (yet) on <img> elements
2) It'll only work for backgrounds *if* there are other styles present that will trigger PIE to take over rendering of the background. For example, applying border-radius or specifying the bg image using -pie-background. Just adding the behavior call isn't enough.