diff --git a/lib/functions/formfields/hidden/function.validateFormFieldHidden.php b/lib/functions/formfields/hidden/function.validateFormFieldHidden.php
index 82ba8631..11302345 100644
--- a/lib/functions/formfields/hidden/function.validateFormFieldHidden.php
+++ b/lib/functions/formfields/hidden/function.validateFormFieldHidden.php
@@ -19,13 +19,20 @@
 
 function validateFormFieldHidden($fieldname, $fielddata, $newfieldvalue)
 {
-	if($newfieldvalue === $fielddata['value'])
-	{
+	/**
+	 * don't show error on cronjob-timestamps changing
+	 * because it might be possible that the cronjob ran
+	 * while settings have been edited (bug #52)
+	 */
+	if($newfieldvalue === $fielddata['value']
+		|| $fieldname == 'system_last_tasks_run'
+		|| $fieldname == 'system_last_traffic_run'
+		|| $fieldname == 'system_lastcronrun'
+	) {
 		return true;
 	}
 	else
 	{
-		// TODO: Throw some error that actually makes sense - false would just throw unknown error
-		return false;
+		return 'hiddenfieldvaluechanged';
 	}
 }
diff --git a/lng/english.lng.php b/lng/english.lng.php
index 0b6969c0..b8633595 100644
--- a/lng/english.lng.php
+++ b/lng/english.lng.php
@@ -1303,5 +1303,6 @@ $lng['admin']['newerversionavailable'] = 'There is a newer version of Froxlor av
 // ADDED IN FROXLOR 0.9.3
 
 $lng['emails']['noemaildomainaddedyet'] = 'You do not have a (email-)domain in your account yet.';
+$lng['error']['hiddenfieldvaluechanged'] = 'The value for the hidden field &quot;%s&quot; changed while editing the settings.<br /><br />This is usually not a big problem but the settings could not be saved because of this.';
 
 ?>
diff --git a/lng/german.lng.php b/lng/german.lng.php
index b0ec91d9..5809e5de 100644
--- a/lng/german.lng.php
+++ b/lng/german.lng.php
@@ -1283,5 +1283,6 @@ $lng['admin']['newerversionavailable'] = 'Eine neuere Version von Froxlor wurde
 // ADDED IN FROXLOR 0.9.3
 
 $lng['emails']['noemaildomainaddedyet'] = 'Sie haben bisher noch keine (E-Mail-)Domain in Ihrem Konto.';
+$lng['error']['hiddenfieldvaluechanged'] = 'Der Wert des verborgenen Feldes &quot;%s&quot; hat sich w&auml;hrend dem &Auml;ndern der Einstellungen ge&auml;ndert.<br /><br />Dies ist im Grunde kein schwerwiegendes Problem, allerdings konnten so die Einstellungen nicht gespeichert werden.';
 
 ?>