diff --git a/api/src/Etemplate.php b/api/src/Etemplate.php
index d2c9d4a9d5..50c4805ba8 100644
--- a/api/src/Etemplate.php
+++ b/api/src/Etemplate.php
@@ -514,6 +514,17 @@ class Etemplate extends Etemplate\Widget\Template
 	{
 		$this->dom_id = $new_id;
 	}
+	
+	/**
+	 * Make sure there's a new request, in case of multiple Etemplates in one call.
+	 * Normally this isn't a problem, but if you've got an etemplate in the sidebox,
+	 * and are seeing problems submitting another etemplate, try this before executing
+	 * the sidebox etemplate.
+	 */
+	public static function reset_request()
+	{
+		self::$request = Etemplate\Request::read();
+	}
 	/**
 	 * Get template data as array
 	 *
diff --git a/calendar/inc/class.calendar_ui.inc.php b/calendar/inc/class.calendar_ui.inc.php
index 1db1738a00..667a456166 100644
--- a/calendar/inc/class.calendar_ui.inc.php
+++ b/calendar/inc/class.calendar_ui.inc.php
@@ -553,6 +553,7 @@ class calendar_ui
 			$this->merge();
 			return;
 		}
+		Etemplate::reset_request();
 		$sidebox = new Etemplate('calendar.sidebox');
 
 		$cont = $this->cal_prefs['saved_states'];