I have a PNG-8 image with transparency, which, due to this problem, I cannot edit in Photoshop (CS5).
Is there a tool that would convert PNG-8 back to PNG-24, preserving transparency layer, so that the file will open correctly in Photoshop?
(The other way to deal with that problem would be to capture a screenshot of any browser displaying that PNG-8 file correctly - but then it would be necessary to induce the transparency layer back, which I'm not sure how is done.)