Your bug report

#20291: png files don't display on emacs 24.4.1

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 20291@debbugs.gnu.org.

-- 
20291: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=20291
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