[arch-dev-public] Some PNG images won't work with libpng 1.6

Evangelos Foutras evangelos at foutrelis.com
Fri May 3 07:36:04 EDT 2013

After moving the libpng 1.6 rebuilds to [testing], I noticed that some
PNG icons wouldn't load. In my case the broken icons belonged to
nm-applet and smplayer (both have been fixed in [extra]).

Some KDE components are probably affected but I'm not sure of the extend

The plan is to run a check on the source files of all packages to better
assess the situation. (pngchecker.py can be used for that.¹)

It's not clear whether future libpng 1.6.x versions will be able to load
these, apparently invalid, PNG images.² Running optipng (which is
statically compiled against libpng 1.4) seems to fix the problematic PNG
files. I have used this workaround in smplayer.³

More information can be found in Gentoo's discussion about this issue:


¹ https://bugs.gentoo.org/show_bug.cgi?id=466190#c11
² https://bugzilla.mozilla.org/show_bug.cgi?id=841734#c3

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