Description of problem:
Recompressing im-chooser.png icon gives a 73% smaller file size without loss of
quality. Recompression is done using "advpng" command from advancecomp package.

Version-Release number of selected component (if applicable):
im-chooser-0.5.3-1.fc8

Steps to Reproduce:
1. cp /usr/share/pixmaps/im-chooser.png .
2. advpng -z -4 im-chooser.png
  
Actual results:
3188        2359  73% im-chooser.png

Additional info:
The new file is 829 bytes smaller without loss of quality.