--- gmap_plugin_style_gmap.inc.dist	2010-07-04 11:17:47.000000000 +0000
+++ gmap_plugin_style_gmap.inc	2010-08-21 06:32:08.000000000 +0000
@@ -133,10 +133,12 @@
 
       // We search nid argument used to center map
       if ($this->options['center_on_nodearg'] && $nodehandler = $this->view->display_handler->get_handler('argument', $this->options['center_on_nodearg_arg'])) {
-        $center_nid = $nodehandler->get_value();
+        $nodehandle_value_list = preg_split("/[,+]/", $nodehandler->get_value());
+        $center_nid = $nodehandle_value_list[0];
       }
       if ($this->options['highlight_nodearg'] && $nodehandler = $this->view->display_handler->get_handler('argument', $this->options['highlight_nodearg_arg'])) {
-        $highlight_nid = $nodehandler->get_value();
+        $nodehandle_value_list = preg_split("/[,+]/", $nodehandler->get_value());
+        $highlight_nid = $nodehandle_value_list[0];
       }
 
       foreach ($records as $row_index => $row) {