=== modified file 'imageapi_imagemagick.module'
--- old/imageapi_imagemagick.module	2009-04-22 13:48:14 +0000
+++ new/imageapi_imagemagick.module	2009-04-22 13:48:32 +0000
@@ -190,7 +190,7 @@
     1 => array('pipe', 'w'), // stdout
     2 => array('pipe', 'w')  // stderr
   );
-  if ($h = proc_open($convert_path .' '. $command_args, $descriptors, $pipes, $_SERVER['DOCUMENT_ROOT'])) {
+  if ($h = proc_open($convert_path .' '. $command_args, $descriptors, $pipes, $_SERVER['DOCUMENT_ROOT'] . base_path())) {
     $output = '';
     while (!feof($pipes[1])) {
       $output .= fgets($pipes[1]);