--- template.php.preprocess_comment_fix 2012-05-01 11:48:40.000000000 -0400
+++ template.php    2012-05-01 11:49:27.000000000 -0400
@@ -201,8 +201,10 @@
     }
     else{
       //Yes... I use style
-      if ($picture = file_load($vars['comment']->picture->fid)) {
-        $user_image = image_get_info(image_style_path(variable_get('user_picture_style'), $picture->uri));
+      if(isset($vars['comment']->picture->fid)) {
+        if ($picture = file_load($vars['comment']->picture->fid)) {
+          $user_image = image_get_info(image_style_path(variable_get('user_picture_style'), $picture->uri));
+        }
       }
     }
   }