Index: views/views_rss_views_fields.theme.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/views_rss/views/views_rss_views_fields.theme.inc,v
retrieving revision 1.1.2.12
diff -u -p -r1.1.2.12 views_rss_views_fields.theme.inc
--- views/views_rss_views_fields.theme.inc	26 Aug 2010 20:38:04 -0000	1.1.2.12
+++ views/views_rss_views_fields.theme.inc	4 Dec 2010 18:21:23 -0000
@@ -37,7 +37,7 @@ function template_preprocess_views_view_
   $items = $view->style_plugin->map_rows($vars['rows']);
   foreach($items as $item) {
     // Special handling for GeoRSS.
-    if (is_numeric($item['lat']) && is_numeric($item['lon'])) {
+    if (isset($item['lat']) && is_numeric($item['lat']) && isset($item['lon']) && is_numeric($item['lon'])) {
       $item['georss:point'] = $item['lat'] .' '.  $item['lon'];
     }
     if(isset($item['featureName'])) {