title: Rails 3, windows, Paperclip can't make thumbnails
body: <p>So I am using windows 7, Rails 3, latest paperclip gem and ImageMagick-6.7.7-Q16 (tested in cmd), my PATH environment is updated.</p>
  
  <p><strong>Model</strong></p>
  
  <pre><code>class Image &lt; ActiveRecord::Base
    attr_accessible :description, :user_id, :file
    has_attached_file :file, :styles =&gt; { :medium =&gt; "300x300&gt;", :thumb =&gt; "100x100&gt;" }, :storage =&gt; :filesystem
  
    belongs_to :user
  
    #validations
    validates_attachment_presence :file
    validates_attachment_size :file, :less_than =&gt; 4.megabytes
    validates_attachment_content_type :file, :content_type =&gt; [ 'image/gif', 'image/png', 'image/x-png', 'image/jpeg', 'image/pjpeg', 'image/jpg' ]
  end
  </code></pre>
  
  <p><strong>Form</strong></p>
  
  <pre><code>&lt;%= form_for(@image, :html =&gt; { :multipart =&gt; true }) do |image| %&gt;
  
      &lt;div class="control-group"&gt;
        &lt;%= image.label :description, "Description", :class =&gt; 'control-label' %&gt;
        &lt;div class="controls"&gt;
          &lt;div class="input-prepend"&gt;
            &lt;%= image.text_field :description %&gt;
          &lt;/div&gt;
        &lt;/div&gt;
      &lt;/div&gt;
  
      &lt;div class="control-group"&gt;
        &lt;%= image.label :file, "Image", :class =&gt; 'control-label' %&gt;
        &lt;div class="controls"&gt;
          &lt;div class="input-prepend"&gt;
            &lt;%= image.file_field :file %&gt;
          &lt;/div&gt;
        &lt;/div&gt;
      &lt;/div&gt;
  
      &lt;%= image.hidden_field :user_id, :value =&gt; current_user.id %&gt;
  
      &lt;div class="actions"&gt;
        &lt;%= image.submit "Upload Image", :class =&gt; 'btn btn-primary btn-medium' %&gt;
      &lt;/div&gt;
  &lt;% end %&gt;
  </code></pre>
  
  <p><strong>My paperclip.rb in initializers</strong></p>
  
  <pre><code>require "paperclip"
  Paperclip.options[:command_path] = 'C:\Program Files (x86)\ImageMagick-6.7.7-Q16'
  Paperclip.options[:swallow_stderr] = false
  Paperclip.options[:whiny_thumbnails] = true
  </code></pre>
  
  <p>Everything is working fine without cropping (:styles => { :medium => "300x300>", :thumb => "100x100>" }). But when I want to make thumbnails Paperclip throws this error</p>
  
  <pre><code>Command :: identify -format %wx%h "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]"
  Command :: convert "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]" -resize "300x300&gt;" "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw520120519-7696-1p8rcsr"
  [paperclip] An error was received while processing: #&lt;Paperclip::Error: There was an error processing the thumbnail for DSCN630520120519-7696-18l3nw5&gt;
  Command :: identify -format %wx%h "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]"
  Command :: convert "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw5.JPG[0]" -resize "100x100&gt;" "C:/Users/Zaraka/AppData/Local/Temp/DSCN630520120519-7696-18l3nw520120519-7696-tx3bmo"
  [paperclip] An error was received while processing: #&lt;Paperclip::Error: There was an error processing the thumbnail for DSCN630520120519-7696-18l3nw5&gt;
  </code></pre>
  
  <p>I figured out that uploaded image isn't even in temp folder, so those created images just have 0 bytes. I'm completely stuck here dunno if something wrong is with paperclip or image upload. 
  Any help will be appreciated</p>