diff --git a/oml/changelog.py b/oml/changelog.py
index 1aa470e..03a95ee 100644
--- a/oml/changelog.py
+++ b/oml/changelog.py
@@ -132,13 +132,13 @@ class Changelog(db.Model):
             if user not in i.users:
                 i.users.append(user)
                 i.update()
-            return True
         else:
             i = Item.get_or_create(itemid, info)
             i.modified = ts2datetime(timestamp)
             if user not in i.users:
                 i.users.append(user)
             i.update()
+        user.clear_smart_list_cache()
         return True
 
     def action_edititem(self, user, timestamp, itemid, meta):
@@ -166,6 +166,7 @@ class Changelog(db.Model):
             i.update_meta(meta)
             i.modified = ts2datetime(timestamp)
         i.save()
+        user.clear_smart_list_cache()
         return True
 
     def action_removeitem(self, user, timestamp, itemid):
@@ -178,6 +179,8 @@ class Changelog(db.Model):
                 i.update()
             else:
                 i.delete()
+        user.clear_list_cache()
+        user.clear_smart_list_cache()
         return True
 
     def action_addlist(self, user, timestamp, name, query=None):
@@ -191,6 +194,7 @@ class Changelog(db.Model):
         if 'name' in new:
             l.name = new['name']
         l.save()
+        user.clear_list_cache()
         return True
 
     def action_orderlists(self, user, timestamp, lists):
@@ -208,12 +212,15 @@ class Changelog(db.Model):
         l = List.get(user.id, name)
         if l:
             l.remove()
+        user.clear_list_cache()
         return True
 
     def action_addlistitems(self, user, timestamp, name, ids):
         from user.models import List
         l = List.get_or_create(user.id, name)
         l.add_items(ids)
+        user.clear_list_cache()
+        user.clear_smart_list_cache()
         return True
 
     def action_removelistitems(self, user, timestamp, name, ids):
@@ -221,6 +228,8 @@ class Changelog(db.Model):
         l = List.get(user.id, name)
         if l:
             l.remove_items(ids)
+        user.clear_list_cache()
+        user.clear_smart_list_cache()
         return True
 
     def action_editusername(self, user, timestamp, username):
@@ -267,6 +276,7 @@ class Changelog(db.Model):
                 m = Metadata.get_or_create(key, value)
             if m.edit(data):
                 m.update_items()
+        user.clear_smart_list_cache()
         return True
 
     def action_resetmeta(self, user, timestamp, key, value):
@@ -274,4 +284,5 @@ class Changelog(db.Model):
         m = Metadata.get(key, value)
         if m and m.timestamp < timestamp:
             m.reset()
+        user.clear_smart_list_cache()
         return True
diff --git a/oml/item/api.py b/oml/item/api.py
index baedef5..e705222 100644
--- a/oml/item/api.py
+++ b/oml/item/api.py
@@ -153,6 +153,7 @@ def edit(data):
     for key in list(state.cache):
         if key.startswith('group:'):
             state.cache.delete(key)
+    state.user().clear_smart_list_cache()
     return response
 actions.register(edit, cache=False)
 
@@ -167,6 +168,7 @@ def remove(data):
     if 'ids' in data and data['ids']:
         for i in models.Item.query.filter(models.Item.id.in_(data['ids'])):
             i.remove_file()
+    state.user().clear_smart_list_cache()
     return {
         'items': []
     }
diff --git a/oml/settings.py b/oml/settings.py
index bcab622..2f82b9e 100644
--- a/oml/settings.py
+++ b/oml/settings.py
@@ -34,6 +34,7 @@ else:
 
 preferences = pdict(os.path.join(config_path, 'preferences.json'), config['user']['preferences'])
 ui = pdict(os.path.join(config_path, 'ui.json'), config['user']['ui'])
+lists_cache = pdict(os.path.join(config_path, 'lists_cache.json'), {})
 
 server = pdict(os.path.join(config_path, 'server.json'))
 server_defaults = {
diff --git a/oml/user/models.py b/oml/user/models.py
index 6c00f4b..cc6134d 100644
--- a/oml/user/models.py
+++ b/oml/user/models.py
@@ -89,6 +89,17 @@ class User(db.Model):
             'user': self.name
         }] + [l.json() for l in self.lists.order_by('index_')]
 
+    def clear_list_cache(self):
+        for key in list(settings.list_cache):
+            if key.startswith(self.id + ':'):
+                del settings.list_cache[key]
+
+    def clear_smart_list_cache(self):
+        smart_lists = [':' + l.name for l in List.query.filter_by(type='smart')]
+        for key in list(settings.list_cache):
+            if key in smart_lists:
+                del settings.list_cache[key]
+
     def update_peering(self, peered, username=None):
         was_peering = self.peered
         if peered:
@@ -118,6 +129,9 @@ class User(db.Model):
                 if not i.users:
                     i.delete()
             Changelog.query.filter_by(user_id=self.id).delete()
+            if self.id in settings.ui['showFolder']:
+                del settings.ui['showFolder'][self.id]
+            self.clear_list_cache()
             self.save()
             if was_peering:
                 Changelog.record(state.user(), 'removepeer', self.id)
@@ -287,16 +301,17 @@ class List(db.Model):
         return self.public_id
 
     def items_count(self):
-        key = 'list:' + self.public_id
-        value = state.cache.get(key)
-        if value is None:
+        key = self.find_id
+        if key in settings.lists_cache:
+            value = settings.lists_cache[key]
+        else:
             from item.models import Item
             if self._query:
                 data = self._query
                 value = Parser(Item).find({'query': data}).count()
             else:
                 value = len(self.items)
-            state.cache.set(key, value, ttl=90)
+            settings.lists_cache[key] = value
         return value
 
     def json(self):