diff --git a/importexport/inc/class.importexport_export_ui.inc.php b/importexport/inc/class.importexport_export_ui.inc.php
index b5a655581f..96304b0346 100644
--- a/importexport/inc/class.importexport_export_ui.inc.php
+++ b/importexport/inc/class.importexport_export_ui.inc.php
@@ -16,22 +16,22 @@
  */
 class importexport_export_ui {
 	const _appname = 'importexport';
-	
+
 	public $public_functions = array(
 		'export_dialog' =>	true,
 		'download' 		=>	true,
 	);
-	
+
 	private $js;
 	private $user;
-	
+
 	/**
 	 * holds all export plugins from all apps
 	 *
 	 * @var array
 	 */
 	private $export_plugins;
-	
+
 	public function __construct() {
 		$this->js = $GLOBALS['egw']->js = is_object($GLOBALS['egw']->js) ? $GLOBALS['egw']->js : CreateObject('phpgwapi.javascript');
 		$this->js->validate_file('.','export_dialog','importexport');
@@ -39,21 +39,21 @@ class importexport_export_ui {
 		$this->user = $GLOBALS['egw_info']['user']['user_id'];
 		$this->export_plugins = importexport_helper_functions::get_plugins('all','export');
 		$GLOBALS['egw_info']['flags']['include_xajax'] = true;
-		
+
 	}
-	
+
 	public function export_dialog($_content=array()) {
 		$tabs = 'general_tab|selection_tab|options_tab';
 		$sel_options = array();
 		$readonlys = array();
 		$preserv = array();
-	
+
 		$et = new etemplate(self::_appname. '.export_dialog');
 		$_appname = $_content['appname'] ? $_content['appname'] : $_GET['appname'];
 		$_definition = $_content['definition'] ? $_content['definition'] : $_GET['definition'];
-		$_plugin = $_content['plugin'] ? $_content['plugin'] : $_GET['plugin']; 
+		$_plugin = $_content['plugin'] ? $_content['plugin'] : $_GET['plugin'];
 		$_selection = $_content['selection'] ? $_content['selection'] : $_GET['selection'];
-			
+
 			//error_log(__FILE__.__FUNCTION__. '::$_GET[\'appname\']='. $_appname. ',$_GET[\'definition\']='. $_definition. ',$_GET[\'plugin\']='.$_plugin. ',$_GET[\'selection\']='.$_selection);
 		// if appname is given and valid, list available definitions (if no definition is given)
 		$readonlys['appname'] = (!empty($_appname) && $GLOBALS['egw']->acl->check('run',1,$_appname));
@@ -82,10 +82,10 @@ class importexport_export_ui {
 		if(isset($_definition) && array_key_exists($_definition,$sel_options['definition'])) {
 			$content['definition'] = $_definition;
 		}
-		
+
 		// fill plugins
 		$sel_options['plugin'] = $this->export_plugins[$_appname]['export'];
-			
+
 		// show definitions or plugins in ui?
 		if($content['definition'] == 'expert') {
 			if(isset($_plugin) && array_key_exists($_plugin,$sel_options['plugin'])) {
@@ -105,7 +105,7 @@ class importexport_export_ui {
 
 			$this->js->set_onload("set_style_by_class('tr','select_plugin','display','none');");
 			$this->js->set_onload("set_style_by_class('tr','save_definition','display','none');");
-			
+
 			$definition = new importexport_definition($content['definition']);
 			if($definition) {
 				$content += (array)$definition->plugin_options;
@@ -113,13 +113,13 @@ class importexport_export_ui {
 				$content['description'] = $definition->description;
 			}
 		}
-			
+
 		// handle selector
 		if($selected_plugin) {
 			$plugin_object = new $selected_plugin;
-			
+
 			$content['description'] = $plugin_object->get_description();
-			
+
 			// fill options tab
  			if(method_exists($plugin_object, 'get_selectors_html')) {
 				$content['plugin_options_html'] = $plugin_object->get_options_html();
@@ -139,7 +139,7 @@ class importexport_export_ui {
 				$readonlys[$tabs]['options_tab'] = true;
 			}
 		}
-			
+
 		// fill selection tab
 		if($definition && $definition->plugin_options['selection']) {
 			$_selection = $definition->plugin_options['selection'];
@@ -173,18 +173,22 @@ class importexport_export_ui {
 				disable_button('exec[export]');
 			");
 		}
-		$content = array_merge($content,(array)$GLOBALS['egw_info']['user']['preferences']['importexport'][$definition->definition_id]);
+		if (($prefs = $GLOBALS['egw_info']['user']['preferences']['importexport'][$definition->definition_id]) &&
+			($prefs = unserialize($prefs)))
+		{
+			$content = array_merge($content,$prefs);
+		}
 		unset ($plugin_object);
 		(array)$apps = importexport_helper_functions::get_apps('export');
 		$sel_options['appname'] = array('' => lang('Select one')) + array_combine($apps,$apps);
 		$this->js->set_onload("set_style_by_class('tr','select_plugin','display','none');");
 		if(!$_application && !$selected_plugin) {
-			$content['plugin_selectors_html'] = $content['plugin_options_html'] = 
+			$content['plugin_selectors_html'] = $content['plugin_options_html'] =
 					lang('You need to select an app and format first!');
 			$this->js->set_onload("document.getElementById('importexport.export_dialog.options_tab-tab').style.visibility='hidden';");
 			$this->js->set_onload("document.getElementById('importexport.export_dialog.selection_tab-tab').style.visibility='hidden';");
 		}
-		
+
 		// disable preview box
 		$this->js->set_onload("set_style_by_class('tr','preview-box','display','none');");
 
@@ -193,7 +197,7 @@ class importexport_export_ui {
 		{
 			//error_log(__LINE__.__FILE__.'$_content: '.print_r($_content,true));
 			$response = new xajaxResponse();
-	
+
 			if ($_content['definition'] == 'expert') {
 				$definition = new importexport_definition();
 				$definition->definition_id	= $_content['definition_id'] ? $_content['definition_id'] : '';
@@ -207,7 +211,7 @@ class importexport_export_ui {
 			else {
 				$definition = new importexport_definition($_content['definition']);
 			}
-		
+
 			if(!is_array($definition->plugin_options)) {
 				$definition->plugin_options = array(
 					'mapping'	=>	array()
@@ -217,7 +221,7 @@ class importexport_export_ui {
 				$definition->plugin_options,
 				$_content
 			);
-		
+
 			if(!$definition->plugin_options['selection']) {
 				$response->addScript('alert("' . lang('No records selected') . '");');
 				return $response->getXML();
@@ -233,7 +237,7 @@ class importexport_export_ui {
 
 			// Keep settings
 			$keep = array_diff_key($_content, array_flip(array('appname', 'definition', 'plugin', 'preview', 'export', $tabs)));
-			$GLOBALS['egw']->preferences->add('importexport',$definition->definition_id,$keep);
+			$GLOBALS['egw']->preferences->add('importexport',$definition->definition_id,serialize($keep));
 			// save prefs, but do NOT invalid the cache (unnecessary)
 			$GLOBALS['egw']->preferences->save_repository(false,'user',false);
 
@@ -254,7 +258,7 @@ class importexport_export_ui {
 								'[\020]','[\021]','[\022]','[\023]','[\024]','[\025]','[\026]','[\027]',
 								'[\030]','[\031]','[\032]','[\033]','[\034]','[\035]','[\036]','[\037]');
 				$replace = $preview = '';
-				
+
 				while(!feof($file) && $item_count < 10) {
 					$preview .= preg_replace($search,$replace,fgets($file,1024));
 					$item_count++;
@@ -262,18 +266,18 @@ class importexport_export_ui {
 
 				fclose($file);
 				unlink($tmpfname);
-				
-				// NOTE: $definition->plugin_options['charset'] may not be set, 
+
+				// NOTE: $definition->plugin_options['charset'] may not be set,
 				// but it's the best guess atm.
 				$preview = $GLOBALS['egw']->translation->convert( $preview,
 					$definition->plugin_options['charset'],
 					$GLOBALS['egw']->translation->charset()
 				);
-				
+
 				$response->addAssign('exec[preview-box]','innerHTML',nl2br($preview));
 				$response->jquery('.preview-box','show');
 				$response->jquery('.preview-box-buttons','show');
-				
+
 				$response->addScript("xajax_eT_wrapper();");
 				return $response->getXML();
 			}
@@ -286,7 +290,7 @@ class importexport_export_ui {
 		//error_log(print_r($content,true));
 		return $et->exec(self::_appname. '.importexport_export_ui.export_dialog',$content,$sel_options,$readonlys,$preserv,2);
 	}
-	
+
 	public function ajax_get_definitions($_appname, xajaxResponse &$response = null) {
 		if(is_null($response)) {
 			$response = new xajaxResponse();
@@ -297,7 +301,7 @@ class importexport_export_ui {
 			$response->addScript("set_style_by_class('tr','select_definition','display','none');");
 			return $no_return ? '' : $response->getXML();
 		}
-		
+
 		$definitions = new importexport_definitions_bo(array(
 			'type' => 'export',
 			'application' => $_appname
@@ -313,7 +317,7 @@ class importexport_export_ui {
 		}
 		unset($definitions);
 		$response->addScript("selectbox_add_option('exec[definition]','" . lang('Expert options') . "', 'expert',".($selected_plugin == $title ? 'true' : 'false').");");
-		
+
 		if($selected_plugin == 'expert') {
 			$this->ajax_get_plugins($_appname, $response);
 		} else {
@@ -323,7 +327,7 @@ class importexport_export_ui {
 		$response->addScript("set_style_by_class('tr','select_definition','display','table-row');");
 		return $no_return ? '' : $response->getXML();
 	}
-	
+
 	public function ajax_get_plugins($_appname, xajaxResponse &$response = null) {
 		if(!is_null($response)) {
 			$no_return = true;
@@ -334,7 +338,7 @@ class importexport_export_ui {
 			$response->addScript("set_style_by_class('tr','select_plugin','display','none');");
 			return $no_return ? '' : $response->getXML();
 		}
-		
+
 		(array)$plugins = importexport_helper_functions::get_plugins($_appname,'export');
 		$sel_options['plugin'] = '';
 		$response->addScript("clear_options('exec[plugin]');");
@@ -342,14 +346,14 @@ class importexport_export_ui {
 			if (!$selected_plugin) $selected_plugin = $plugin;
 			$response->addScript("selectbox_add_option('exec[plugin]','$plugin_name', '$plugin',".($selected_plugin == $plugin ? 'true' : 'false').");");
 		}
-		
+
 		$this->ajax_get_plugin_description($selected_plugin,$response);
 		$this->ajax_get_plugin_options($selected_plugin, $response, $_definition);
 		$this->ajax_get_plugin_selectors($selected_plugin, $response, $_definition);
 		$response->addScript("set_style_by_class('tr','select_plugin','display','table-row');");
 		return $no_return ? '' : $response->getXML();
 	}
-	
+
 	public function ajax_get_definition_description($_definition, xajaxResponse &$response=null) {
 		$no_return = !is_null($response);
 		if(is_null($response)) {
@@ -365,7 +369,7 @@ class importexport_export_ui {
 
 		return $no_return ? '' : $response->getXML();
 	}
-	
+
 	public function ajax_get_plugin_description($_plugin,&$_response=false) {
 		$no_return = !is_null($_response);
 		if(is_null($_response)) {
@@ -384,17 +388,17 @@ class importexport_export_ui {
 			$this->ajax_get_plugin_options($_plugin, $_response);
 		}
 		unset ($plugin_object);
-		
+
 		return $no_return ? '' : $response->getXML();
 	}
-	
+
 	public function ajax_get_plugin_options($_plugin,&$response=false, $definition = '') {
 		$no_return = !is_null($response);
 		if(is_null($response)) {
 			$response = new xajaxResponse();
 		}
 		if (!$_plugin) return $no_return ? '' : $response->getXML();
-		
+
 		$plugin_object = new $_plugin;
 		if (is_a($plugin_object, 'importexport_iface_export_plugin')) {
 			$options = $plugin_object->get_options_etpl();
@@ -414,10 +418,10 @@ class importexport_export_ui {
 		}
 
 		unset ($plugin_object);
-		
+
 		return $no_return ? '' : $response->getXML();
 	}
-	
+
 	/**
 	 * downloads file to client and deletes it.
 	 *
@@ -428,7 +432,7 @@ class importexport_export_ui {
 		$tmpfname = $_tmpfname ? $_tmpfname : $_GET['_filename'];
 		$tmpfname = $GLOBALS['egw_info']['server']['temp_dir'] .'/'. $tmpfname;
 		if (!is_readable($tmpfname)) die();
-		
+
 		$appname = $_GET['_appname'];
 		$nicefname = 'egw_export_'.$appname.'-'.date('Y-m-d');
 
@@ -442,14 +446,14 @@ class importexport_export_ui {
 
 		unlink($tmpfname);
 	}
-	
+
 	public function ajax_get_plugin_selectors($_plugin,&$response=false, $definition = '') {
 		$no_return = !is_null($response);
 		if(is_null($response)) {
 			$response = new xajaxResponse();
 		}
 		if (!$_plugin) return $no_return ? '' : $response->getXML();
-		
+
 		$plugin_object = new $_plugin;
 		if (is_a($plugin_object, 'importexport_iface_export_plugin')) {
 			$options = $plugin_object->get_selectors_etpl();
@@ -471,11 +475,11 @@ class importexport_export_ui {
 		}
 
 		unset ($plugin_object);
-		
+
 		return $no_return ? '' : $response->getXML();
 	}
-	
+
 	public function ajax_get_template($_name) {
-		
+
 	}
 } // end class uiexport