Index: includes/calendar_plugin_display_attachment.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/calendar/includes/calendar_plugin_display_attachment.inc,v
retrieving revision 1.1.2.22
diff -u -p -r1.1.2.22 calendar_plugin_display_attachment.inc
--- includes/calendar_plugin_display_attachment.inc	3 Jan 2011 02:39:05 -0000	1.1.2.22
+++ includes/calendar_plugin_display_attachment.inc	12 Jan 2011 20:22:30 -0000
@@ -125,7 +125,8 @@ class calendar_plugin_display_attachment
     $this->view->date_info->parent_id = $display_id;
 
     // See if we're attaching to a block rather than a page.
-    if (substr($display_id, 0, 14) == 'calendar_block') {
+    $display_plugin = $this->view->display_handler->display->display_plugin;
+    if (in_array($display_plugin, array('calendar_block', 'block'))) {
       $this->view->date_info->mini = TRUE;
       $this->view->date_info->block = TRUE;
       $this->view->date_info->calendar_popup = FALSE;