diff --git a/preferences/inc/class.bosettings.inc.php b/preferences/inc/class.bosettings.inc.php
index c3ad9384ed..8bcba89bdc 100644
--- a/preferences/inc/class.bosettings.inc.php
+++ b/preferences/inc/class.bosettings.inc.php
@@ -125,7 +125,9 @@
 			if ($appname == 'preferences') $appname = 'common';
 			foreach ($this->settings as $name => $data)
 			{
-				if ((string)$GLOBALS['egw']->preferences->default[$appname][$name] === '' &&
+				// only set not yet set default prefs, so user is able to unset it again with ""
+				// (only works with type vfs_*, other types delete empty values!)
+				if (!isset($GLOBALS['egw']->preferences->default[$appname][$name]) &&
 					((string)$data['default'] !== '' || (string)$data['forced'] !== ''))
 				{
 					$default = (string)$data['forced'] !== '' ? $data['forced'] : $data['default'];
@@ -169,7 +171,7 @@
 			}
 			if($this->debug)
 			{
-				echo 'Preferences array: ' . $app . "\n";
+				echo 'Preferences array: ' . $app . "/$type\n";
 				_debug_array($this->prefs);
 			}
 			/* Ensure that a struct will be returned via xml-rpc (this might change) */
diff --git a/preferences/inc/class.uisettings.inc.php b/preferences/inc/class.uisettings.inc.php
index 9109e60043..cc66ee3b4c 100755
--- a/preferences/inc/class.uisettings.inc.php
+++ b/preferences/inc/class.uisettings.inc.php
@@ -205,7 +205,7 @@ class uisettings
 		}
 
 		// display verifcation errors also on entering preferences, not only after saving
-		if (!isset($_POST['save']) || !isset($_POST['apply']))
+		if (!isset($_POST['save']) && !isset($_POST['apply']))
 		{
 			if (!$this->is_admin() || !in_array($GLOBALS['type'], array('user', 'default', 'forced')))
 			{
@@ -275,6 +275,8 @@ class uisettings
 						$valarray['label'],
 						$valarray['name'],
 						$valarray['help'],
+						$valarray['default'],
+						$valarray['size'],
 						$valarray['run_lang']
 					);
 					break;
@@ -436,7 +438,7 @@ class uisettings
 		{
 			return True;
 		}
-		//echo "<p>create_input_box('$label_name', '$preference_name][$type', '$help', '$default', '', '', '', $run_lang, '$def_text')</p>\n";
+		//echo "<p>create_input_box('$label_name', '$preference_name][$type', '$help', '$default', '$size', '', '', $run_lang, '$def_text')</p>\n";
 		$this->create_input_box($label_name,$preference_name.']['.$type,
 			$help,$default,$size,'','',$run_lang,$def_text);
 	}