This smells like a serious bug. It has the potential to destabilise other parts of your application.

As a work-around, your best bet could be to convert your sub to a stand-alone command-script and run it as a once per image from your main program.

Submit this as a bug report, if you've got a few minutes, Otherwise I will!

Update:The bug went away on my system after I upgraded to 6.3.6

From the change log: 

2007-05-03  6.3.4-1 Cristy  <quetzlzacatenango@image...>
  * Add support for PFM images.
  * Check for corrupt EXIF image profiles.
  * Writing JPEG YCbCr TIFF images no longer faults (reference
    http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=8896).

In reply to Re^3: Image::Magick Exception 430 by snoopy
in thread Image::Magick Exception 430 by ruzam

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