Index: img_assist.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/img_assist/img_assist.module,v
retrieving revision 1.103
diff -u -p -r1.103 img_assist.module
--- img_assist.module	9 Jun 2009 00:55:06 -0000	1.103
+++ img_assist.module	4 Jul 2009 11:36:45 -0000
@@ -1301,7 +1301,13 @@ function img_assist_display(&$node, $siz
   if ($regen) {
     _img_assist_build_derivatives($node, $size);
   }
-  
+
+  // For custom size images, add a consistent CSS class, JavaScripts can rely on.
+  $attributes = array();
+  if (is_array($size) && isset($size['key']) && strpos($size['key'], 'img_assist_custom') === 0) {
+    $attributes['class'] = 'image-img_assist_custom';
+  }
+
   return image_display($node, $label);
 }