Hi all,
i have this problem too.
I found phpthumb.functions.php use exec(), system(), passthru(), shell_exec() functions to work with imagemagic.
On my shared hosting aren’t this functions disabled, but i haven’t access to execute shell commands.
[2010-11-26 11:54:39] (ERROR @ /www/sites/6/site6376/public_html/parkety/core/model/phpthumb/phpthumb.functions.php : 462) PHP warning: passthru() [<a href=’function.passthru’>function.passthru</a>]: Unable to fork [which convert 2>&1]
Solutions is maybe use imagemagic php api (imagick) for generate thumbnails or for resizing images.
PHP Version 5.2.6-1+lenny9
GD Support enabled
GD Version 2.0 or higher
FreeType Support enabled
FreeType Linkage with freetype
FreeType Version 2.3.7
T1Lib Support enabled
GIF Read Support enabled
GIF Create Support enabled
JPG Support enabled
PNG Support enabled
WBMP Support enabled
imagick module enabled
imagick module version 2.1.1-rc1
imagick classes Imagick, ImagickDraw, ImagickPixel, ImagickPixelIterator
ImageMagick version ImageMagick 6.3.7 08/09/09 Q16
http://www.imagemagick.org
ImageMagick copyright Copyright (C) 1999-2008 ImageMagick Studio LLC
ImageMagick release date 08/09/09
ImageMagick Number of supported formats: 179