You're misunderstanding the problem.

I use Adobe Photoshop 7 and have exported to a perfectly valid PNG-8 file. Firefox, IE, and even Windows' crummy image previewer all show it correctly. But when I import it into Phoenix's image editor to set up my tiles and "slices" of the image for frames the file isn't loaded correctly.

Hence my question to Andreaz possibly fixing the loading problem. His tool ignores the palette and treats the image as a grayscale image, which it most certainly isn't (in this instance).