Index: handlers/location_views_handler_filter_proximity.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/location/handlers/location_views_handler_filter_proximity.inc,v
retrieving revision 1.3
diff -u -r1.3 location_views_handler_filter_proximity.inc
--- handlers/location_views_handler_filter_proximity.inc	3 Dec 2008 22:51:23 -0000	1.3
+++ handlers/location_views_handler_filter_proximity.inc	7 Apr 2009 18:08:44 -0000
@@ -197,6 +197,11 @@
       // Distance set?
       if (!empty($this->value['search_distance'])) {
         // Hmm, distance set but unable to resolve coordinates.
+        // check to see if filter is optional
+        if ($this->options['exposed'] && $this->options['expose']['optional']) {
+          // the filter is optional, so we do nothing
+          return;
+        }
         // Force nothing to match.
         $this->query->add_where($this->options['group'], "0");
       }