[Magick-bugs] Crop produces small and corrupt files when working on really large files

[quetzlzacatenango at imagemagick.org]

> and I get a 2.4mb png which is mostly black, with the odd band of picture.

Try

  convert -crop 14464x13504+0+0 Pre-Crop.png +repage Post-Crop.png

If that fails, try ImageMagick 6.3.0-0, the latest release.  Your image
converted fine for us with that release.