This patch fixes the problem in PNGImage, since GWT 1.5, which now insists that setElement() can only be called once for any element. This also prevented LightBox.show() from working.
I suspect this also addresses [1736572] LightBox init.
There are other ways to solve this. It would be great if this (or another solution) was incorporated.
Thanks,
Glenn.
SVN patch
It only fixes compile problem.
Transparent PNGs still don't work in IE.
Works the same as
class PNGImage extends Image {
//place constructors with super calls here
}