Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.
We tried your image with ImageMagick 6.2.6-2 under Mac OS X Panther and it identified the image without complaint. Unless we can reproduce a problem, we can't fix it.