Скрипт сообщает:
Looks like Imagemagick lib is a bit old IM says it's version 'Copyright: Copyright (C) 1999-2010 ImageMagick Studio LLC', it's good idea to update it.
Но после обновления IM до версии 6.8.7-5 (с) 2013 перестали кропиться тумбы
В логах:
IM process error convert: no decode delegate for this image format `../tmp/8070d0c6c5d6fd5fcc0f882e78259ec017.tmp.jpg.tmp.jpg' @ error/constitute.c/ReadImage/552.<br> convert: no images defined `../tmp/8070d0c6c5d6fd5fcc0f882e78259ec017.tmp.jpg' @ error/convert.c/ConvertImageCommand/3145.<br>
Grabber : thumb was not created. Please, check IM path or IM string