diff --git a/config_editor.inc.php b/config_editor.inc.php
index 66bb15d8..df7c230e 100644
--- a/config_editor.inc.php
+++ b/config_editor.inc.php
@@ -51,7 +51,9 @@ function config_editor_parse_from_http_headers($array_name)
 		if(is_array($_POST[$array_name][$id])) {
 			$ans[$id] = array();
 			foreach($_POST[$array_name][$id] as $k=>$v) {
-				$ans[$id][$k]=stripslashes($v);
+				if($v != '') {
+					$ans[$id][$k]=stripslashes($v);
+				}
 			}
 		} else {
 			$ans[$id] = stripslashes($_POST[$array_name][$id]);
@@ -216,6 +218,7 @@ function config_editor($category, $year, $array_name, $self)
 				if($sz > 5) $sz=5;
 				$multiple = "$multiple size=\"$sz\"";
 				$name="{$name}[]";
+				print("<input type=\"hidden\" name=\"$name\" value=\"\" >\n");
 			}
 			print("<select $multiple name=\"$name\">");
 			for($x=0; $x<count($regs[1]); $x++) {