Well, it isn't (just) tetex. I've switched to texlive, and the error
is still there. The output of the script follows. The only mention of
libpng12 is in libcairo, under x11.

        /sw/lib/libpng14.14.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/graphviz/tcl/libgdtclft.0.dylib
        /sw/lib/libpng14.14.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/graphviz/tcl/libtcldot.0.dylib
        /sw/lib/libpng14.14.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/graphviz/tcl/libtcldot_builtin.0.dylib
        /sw/lib/libpng15.15.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libcairo.2.dylib
        /sw/lib/libpng14.14.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libfltk_images.1.1.dylib
        /sw/lib/libpng15.15.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libgd.2.dylib
        /sw/lib/libpng15.15.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libming.1.4.1.dylib
        /sw/lib/libpng15.15.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libplot.2.dylib
        /sw/lib/libpng15.15.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libplotter.2.dylib
        /sw/lib/libpng15.15.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libpoppler.34.dylib
        /sw/lib/libpng14.14.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libwebkit-1.0.2.dylib
        /sw/lib/libpng14.14.dylib (compatibility version 26.0.0, current
version 26.0.0)
/sw/lib/libwmf-0.2.7.1.0.dylib
        /usr/X11/lib/libpng12.0.dylib (compatibility version 47.0.0, current
version 47.0.0)
/usr/X11/lib/libcairo.2.dylib

On Fri, Apr 5, 2013 at 1:07 PM, Peter Dyballa <[email protected]> wrote:
>
> Am 04.04.2013 um 11:55 schrieb Sean Lake:
>
>> libpng warning: Application built with libpng-1.2.41 but running with 1.5.10
>
> Sean,
>
> one possible try to find a potential culprit is this script. First the 
> version for (t)csh:
>
>         foreach Lib ( `find /sw/lib /usr/X11/lib -type f \( -name "*.dylib" 
> -a \! -name "libpng*" \)` )
>           otool -L $Lib | grep png && echo $Lib
>         end
>
> And now the version for (ba)sh:
>
>         for Lib in `find /sw/lib /usr/X11/lib -type f \( -name "*.dylib" -a 
> \! -name "libpng*" \)` ; do
>           otool -L $Lib | grep png && echo $Lib
>         done
>
> If you want you can change "grep png" to "grep png12" and you'll have less 
> hits. If your X11 distribution in not in /usr/X11 you'll need to correct 
> "/usr/X11/lib" and similarly "/sw/lib". The output will be a list à la:
>
>         /sw/lib/graphviz/tcl/libgdtclft.0.dylib
>                 /sw/lib/libpng12.0.dylib (compatibility version 50.0.0, 
> current version 50.0.0)
>         /sw/lib/graphviz/tcl/libtcldot.0.dylib
>                 /sw/lib/libpng12.0.dylib (compatibility version 50.0.0, 
> current version 50.0.0)
>         /sw/lib/graphviz/tcl/libtcldot_builtin.0.dylib
>                 /sw/lib/libpng15.15.dylib (compatibility version 26.0.0, 
> current version 26.0.0)
>
> – which is a biz puzzling…
>
> --
> Greetings
>
>   Pete
>
> A lot of us are working harder than we want, at things we don't like to do. 
> Why? ...In order to afford the sort of existence we don't care to live.
>                                 – Bradford Angier
>
>
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