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This is what I get from stderr stream when compiling with lualatex under MikTex 2.9:

This is dvips(k) 5.993 Copyright 2013 Radical Eye Software (www.radicaleye.com)
' TeX output 2014.06.27:1240' -> chart-autopp.ps
<d:/Program Files (x86)/MiKTeX 2.9/dvips/base/tex.pro>
<d:/Program Files (x86)/MiKTeX 2.9/dvips/misc/alt-rule.pro>
<d:/Program Files (x86)/MiKTeX 2.9/dvips/pstricks/pstricks.pro>
<d:/Program Files (x86)/MiKTeX 2.9/dvips/pstricks/pst-algparser.pro>
<d:/Program Files (x86)/MiKTeX 2.9/dvips/pst-tools/pst-tools.pro>
<d:/Program Files (x86)/MiKTeX 2.9/dvips/pstricks/pst-dots.pro>
<d:/Program Files (x86)/MiKTeX 2.9/dvips/pst-barcode/pst-barcode.pro>
<d:/Program Files (x86)/MiKTeX 2.9/dvips/base/special.pro>. [1] 
libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: known incorrect sRGB profile

Are these warnings indicating that something needs to be corrected, or they can be ignored?





share|improve this question
It's due to a stricter checking introduced in the latest version of the libpng library, now used by pdftex and luatex; before the last updates they used libpng 1.5.16, now libpng 1.6.10. I don't know if it harms. – egreg Jun 27 '14 at 16:53
Some software will refuse to open or display images unless the 'error' is fixed. For example, GIMP. I don't know if this is likely to affect document viewers or not but the fact that it does not now do so should not be taken as reason to think it won't. You'd need to check whether the software is using an older version of the library which will eventually be updated, possibly triggering trouble. – cfr Jun 27 '14 at 20:48

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