Index: plugins/FeedsDataProcessor.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/feeds/plugins/FeedsDataProcessor.inc,v
retrieving revision 1.16
diff -u -p -r1.16 FeedsDataProcessor.inc
--- plugins/FeedsDataProcessor.inc	27 Jul 2010 20:27:41 -0000	1.16
+++ plugins/FeedsDataProcessor.inc	9 Aug 2010 17:58:13 -0000
@@ -229,7 +229,13 @@ class FeedsDataProcessor extends FeedsPr
       $target_item['#'. $table] = $values;
     }
     else {
-      $target_item[$target_element] = $value;
+      if (is_array($target_item[$target_element]) && is_array($value)) {
+        // If the target has already been set as an array, concatenate the new value.
+        $target_item[$target_element] = array_merge($target_item[$target_element], $value);
+      }
+      else {
+        $target_item[$target_element] = $value;
+      }
     }
   }