k-meleon is a very nice browser, I used to preview web pages I create with it, but since I started using .PNG files (compressed by pngcrush and pngrewrite, don't know if this is the cause of the problem), k-meleon can't show these image types!!
they display fine with other software...
hope the author can fix this

This one is really easy to solve. if you "upgrade" your version of Gecko in K-meleon using a Mozilla nightly build like discussed here, in the 'components' dir of Mozilla you will see a nspng.dll that is not in the 'components' dir of Kmeleon. Just copy it over with the rest, and voilà ! K-meleon now displays PNGs. Magic ! :-)

(PS: keeping current with Mozilla builds really improves Kmeleon a lot. With the original 0.2.1 version I could not type a character in an edit box like I'm doing without blowing up the program and reinstalling. Keyboard navigation is still broken inside these boxes but at least now it works :-)

kmel .4, the newest available from the front page at kmeleon.org can do pngs just fine, and can even render pngs that IE can't