diff --git a/preferences/inc/class.preferences_settings.inc.php b/preferences/inc/class.preferences_settings.inc.php
index f02be67cf7..de5c43973e 100644
--- a/preferences/inc/class.preferences_settings.inc.php
+++ b/preferences/inc/class.preferences_settings.inc.php
@@ -184,6 +184,10 @@ class preferences_settings
 	 */
 	function process_array(array &$repository, array $values, array $types, $appname, $type, $only_verify=false)
 	{
+		if (!$this->call_hook($appname, $type, $GLOBALS['egw']->preferences->get_account_id()))
+		{
+			throw new Api\Exception\WrongParameter("Could not find settings for application: ".$appname);
+		}
 		//_debug_array($repository);
 		$prefs = &$repository[$appname];
 
@@ -243,7 +247,7 @@ class preferences_settings
 
 			if (isset($value) && $value !== '' && $value !== '**NULL**' && $value !== array())
 			{
-				if (is_array($value)) $value = implode(',',$value);	// multiselect
+				if (is_array($value) && !$this->settings[$var]['no_sel_options']) $value = implode(',',$value);	// multiselect
 
 				$prefs[$var] = $value;
 
@@ -392,7 +396,7 @@ class preferences_settings
 					break;
 			}
 			// move values/options to sel_options array
-			if (isset($setting['values']) && is_array($setting['values']))
+			if (isset($setting['values']) && is_array($setting['values']) && !$setting['no_sel_options'])
 			{
 				if ($old_type != 'multiselect' && $old_type != 'notify')
 				{