title: ImageMagick missing decode delegates
body: <p>I recently moved to MediaTemple and installed ImageMagick and IMagick following their KB article <a href="http://kb.mediatemple.net/questions/1778/Is+ImageMagick+installed+on+the+%28gs%29+Grid-Service?#gs" rel="nofollow">here</a>.</p>
  
  <p>No error and phpinfo() show module correctly installed.</p>
  
  <p>When I try to use IM on a JPG image via PHP I get this error</p>
  
  <pre><code>Uncaught exception 'ImagickException' with message 'no decode delegate for this image format 
  /home/149263/domains/wer.com/html/images/pictures/post/tmp/original/' @ error/constitute.c/ReadImage/544' in /nfs/c10/h04/mnt/149263/domains/wer.com/html/application/controllers/post.php:301
  Stack trace:
  #0 /nfs/c10/h04/mnt/149263/domains/wer.com/html/application/controllers/post.php(301): Imagick-&gt;__construct('/home/149263/do...')
  #1 [internal function]: Post-&gt;filter('punch')
  #2 /nfs/c10/h04/mnt/149263/domains/wer.com/html/system/core/CodeIgniter.php(359): call_user_func_array(Array, Array)
  #3 /nfs/c10/h04/mnt/149263/domains/wer.com/html/index.php(217): require_once('/nfs/c10/h04/mn...')
  #4 {main} thrown in /nfs/c10/h04/mnt/149263/domains/wer.com/html/application/controllers/post.php on line 301
  </code></pre>
  
  <p>However <code>convert -list configure</code> returns</p>
  
  <pre><code>DELEGATES     bzlib djvu fontconfig freetype gvc jpeg jp2 lcms openexr png rsvg tiff wmf x11 xml zlib
  </code></pre>
  
  <p>and <code>identify -list format</code> returns</p>
  
  <pre><code>JPEG* JPEG      rw-   Joint Photographic Experts Group JFIF format (62)
  JPG* JPEG      rw-   Joint Photographic Experts Group JFIF format
  </code></pre>
  
  <p>So it looks like the installation is correct.</p>
  
  <pre><code>ImageMagick 6.7.7-0 2012-05-22 
  imagick module version  3.1.0RC1
  </code></pre>
  
  <p>Any suggestions how to troubleshoot this?</p>