Help: problem with PySide and libpng

[Ryan Schmidt]

On Jun 16, 2011, at 14:41, Thomas Haymore wrote:

>  dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
>  /site-packages/PySide/QtGui.so, 2): Library not loaded:
>  /opt/local/lib/libpng12.0.dylib
>   Referenced from: /opt/local/lib/libQtGui.4.dylib
>   Reason: Incompatible library version: libQtGui.4.dylib requires version
>  45.0.0 or later, but libpng12.0.dylib provides version 44.0.0

I responded in the ticket you filed:

https://trac.macports.org/ticket/29857

But now I'm curious why "libpng12.0.dylib provides version 44.0.0" -- why does libpng12.0.dylib exist at all? Where is it, and where did it come from?