diff --git a/plugins/libkolab/js/folderlist.js b/plugins/libkolab/js/folderlist.js
index 274d57f9..00882a8f 100644
--- a/plugins/libkolab/js/folderlist.js
+++ b/plugins/libkolab/js/folderlist.js
@@ -36,6 +36,7 @@ function kolab_folderlist(node, p)
     var search_results_widget;
     var search_results_container;
     var listsearch_request;
+    var search_messagebox;
 
     var Q = rcmail.quote_html;
 
@@ -164,8 +165,29 @@ function kolab_folderlist(node, p)
         }
         search_results = {};
 
+        if (search_messagebox)
+            rcmail.hide_message(search_messagebox);
+
         // send search request(s) to server
         if (search.query && search.execute) {
+            // require a minimum length for the search string
+            if (rcmail.env.autocomplete_min_length && search.query.length < rcmail.env.autocomplete_min_length) {
+                search_messagebox = rcmail.display_message(
+                    rcmail.get_label('autocompletechars').replace('$min', rcmail.env.autocomplete_min_length));
+                return;
+            }
+
+            if (listsearch_request) {
+                // ignore, let the currently runnung sequest finish
+                if (listsearch_request.query == search.query) {
+                    return;
+                }
+                else { // cancel previous search request
+                    rcmail.multi_thread_request_abort(listsearch_request.id);
+                    listsearch_request = null;
+                }
+            }
+
             var sources = p.search_sources || [ 'folders' ];
             var reqid = rcmail.multi_thread_http_request({
                 items: sources,
@@ -173,10 +195,15 @@ function kolab_folderlist(node, p)
                 action:  p.search_action || 'listsearch',
                 postdata: { action:'search', q:search.query, source:'%s' },
                 lock: rcmail.display_message(rcmail.get_label('searching'), 'loading'),
-                onresponse: render_search_results
+                onresponse: render_search_results,
+                whendone: function(e){ listsearch_request = null; }
             });
 
-            listsearch_request = { id:reqid, sources:sources.slice(), num:sources.length };
+            listsearch_request = { id:reqid, query:search.query };
+        }
+        else if (!search.query && listsearch_request) {
+            rcmail.multi_thread_request_abort(listsearch_request.id);
+            listsearch_request = null;
         }
     });
 
diff --git a/plugins/libkolab/lib/kolab_storage.php b/plugins/libkolab/lib/kolab_storage.php
index 1cbdd762..74c0ed36 100644
--- a/plugins/libkolab/lib/kolab_storage.php
+++ b/plugins/libkolab/lib/kolab_storage.php
@@ -1318,11 +1318,12 @@ class kolab_storage
      * @param mixed   $query    Search value (or array of field => value pairs)
      * @param int     $mode     Matching mode: 0 - partial (*abc*), 1 - strict (=), 2 - prefix (abc*)
      * @param array   $required List of fields that shall ot be empty
-     * @param int     $limit    Number of records
+     * @param int     $limit    Maximum number of records
+     * @param int     $count    Returns the number of records found
      *
      * @return array List or false on error
      */
-    public static function search_users($query, $mode = 1, $required = array(), $limit = 0)
+    public static function search_users($query, $mode = 1, $required = array(), $limit = 0, &$count = 0)
     {
         // requires a working LDAP setup
         if (!self::ldap()) {
@@ -1330,7 +1331,12 @@ class kolab_storage
         }
 
         // search users using the configured attributes
-        $results = self::$ldap->search(self::$config->get('kolab_users_search_attrib', array('cn','mail','alias')), $query, $mode, $required, $limit);
+        $results = self::$ldap->dosearch(self::$config->get('kolab_users_search_attrib', array('cn','mail','alias')), $query, $mode, $required, $limit, $count);
+
+        // exclude myself
+        if ($_SESSION['kolab_dn']) {
+            unset($results[$_SESSION['kolab_dn']]);
+        }
 
         // resolve to IMAP folder name
         $root = self::namespace_root('other');
@@ -1391,6 +1397,9 @@ class kolab_storage
             $path_len = count(explode($delimiter, $other_ns));
 
             foreach ((array)self::list_folders($other_ns, '*', '', $subscribed) as $foldername) {
+                if ($foldername == 'INBOX')  // skip INBOX which is added by default
+                    continue;
+
                 // truncate folder path to top-level folders of the 'other' namespace
                 $path = explode($delimiter, $foldername);
                 $foldername = join($delimiter, array_slice($path, 0, $path_len + 1));