Index: webform.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/webform/webform.module,v
retrieving revision 1.196.2.3
diff -u -r1.196.2.3 webform.module
--- webform.module	11 Mar 2010 01:40:15 -0000	1.196.2.3
+++ webform.module	21 Mar 2010 02:46:05 -0000
@@ -1400,9 +1400,14 @@
     }
 
     $test_values = array_map('trim', explode("\n", $conditional_values));
-    foreach ($input_values as $input_value) {
-      if ($show_component = in_array($input_value, $test_values)) {
-        break;
+    if (empty($input_values) && !empty($test_values)) {
+      $show_component = FALSE;
+    }
+    else {
+      foreach ($input_values as $input_value) {
+        if ($show_component = in_array($input_value, $test_values)) {
+          break;
+        }
       }
     }