Index: img_assist.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/img_assist/img_assist.module,v
retrieving revision 1.75.2.11
diff -u -r1.75.2.11 img_assist.module
--- img_assist.module	1 Aug 2008 19:07:14 -0000	1.75.2.11
+++ img_assist.module	14 Aug 2008 12:14:32 -0000
@@ -175,7 +175,7 @@
         $element['#attributes']['class'] = 'img_assist';
       }
       else {
-        $element['#attributes']['class'] += ' img_assist';
+        $element['#attributes']['class'] .= ' img_assist';
       }
     }
   }