I am also affected by this bug. This[0] Ubuntu Forums post suggests a fix, but does not explain the cause. I can confirm that doing what the last post in the thread says does in fact work (recompile ImageMagick with --disable-openmp), but this is obviously not a proper fix. Hopefully it will shed light on what is going on here, however.
Regards, Andrew Barr [0] http://ubuntuforums.org/showthread.php?t=867339 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org