Im using libpng for PNG support; why is there no libmng for MNG support?
There is! Gerard Juyn wrote a free libmng implementation, and as of June 2000, it is very nearly feature-complete. It has been used to create both a MNG plug-in and native MNG support in Mozilla, and it’s used by a number of other toolkits and applications, including Qt. Even better, libmng includes native JNG and PNG support, too. It requires zlib and (for JNG support) libjpeg, but not libpng. • Q: Internet Explorer doesn’t display PNG images even though your web page claims it supports PNG. What’s up with that? A: This appears to be a widespread but not universal problem (Greg was never able to reproduce it) that most often affects Windows versions but can also occur on Mac OS. It may actually have more than one cause. For Windows, by far the simplest approach is to use regsvr32 to re-register IE’s internal PNG support, as passed along by Michael Wexler (possibly based on a posting by ARodriguez on 16 June 2001): I couldn’t see .png files in IE 5.5 even with SP1 installed on Windows
