diff --git a/oml/item/api.py b/oml/item/api.py
index 0fd7a6a..4493233 100644
--- a/oml/item/api.py
+++ b/oml/item/api.py
@@ -168,6 +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'])):
+            logger.info('remove item %s', i)
             i.remove_file()
     state.cache.clear('group:')
     return {
diff --git a/oml/item/handlers.py b/oml/item/handlers.py
index aabeff2..36ca61a 100644
--- a/oml/item/handlers.py
+++ b/oml/item/handlers.py
@@ -172,7 +172,8 @@ class UploadHandler(tornado.web.RequestHandler):
                     id = get_id(data=upload.body)
                     ids.append(id)
                     file = File.get(id)
-                    if not file:
+                    if not file or not os.path.exists(file.fullpath()):
+                        logger.debug('add %s to library', id)
                         prefix_books = os.path.join(os.path.expanduser(prefs['libraryPath']), 'Books' + os.sep)
                         prefix_imported = os.path.join(prefix_books, '.import' + os.sep)
                         ox.makedirs(prefix_imported)
@@ -190,7 +191,13 @@ class UploadHandler(tornado.web.RequestHandler):
                         file.move()
                     else:
                         user = state.user()
-                        file.item.add_user(user)
+                        item = file.item
+                        if user not in item.users:
+                            logger.debug('add %s to local user', id)
+                            item.add_user(user)
+                            add_record('additem', item.id, file.info)
+                            add_record('edititem', item.id, item.meta)
+                            item.update()
             if listname and ids:
                 l = List.get(settings.USER_ID, listname)
                 if l:
diff --git a/oml/item/models.py b/oml/item/models.py
index 27e4191..9448260 100644
--- a/oml/item/models.py
+++ b/oml/item/models.py
@@ -800,6 +800,7 @@ class File(db.Model):
                 if os.path.exists(path) and os.path.exists(current_path):
                     os.unlink(path)
                 return
+            logger.debug('mv "%s" "%s"', self.path, new_path)
             self.path = new_path
             self.save()
             for folder in set(os.path.dirname(p) for p in [current_path, path]):
diff --git a/oml/item/scan.py b/oml/item/scan.py
index d9c4bb1..aa96bdc 100644
--- a/oml/item/scan.py
+++ b/oml/item/scan.py
@@ -7,6 +7,7 @@ import os
 import shutil
 import stat
 import time
+import unicodedata
 
 import ox
 
@@ -31,6 +32,7 @@ def remove_missing(books=None):
     prefix = get_prefix()
     if books is None:
         books = collect_books(prefix)
+    books = [unicodedata.normalize('NFD', path) for path in books]
     with db.session():
         if os.path.exists(prefix):
             logger.debug('scan for removed files')
@@ -40,6 +42,7 @@ def remove_missing(books=None):
                 if state.shutdown:
                     return
                 path = f.fullpath()
+                path = unicodedata.normalize('NFD', path)
                 db_paths.append(path)
                 if f.item:
                     items[path] = f.sha1
@@ -172,7 +175,6 @@ def run_scan():
                 elif user not in file.item.users:
                     item = file.item
                     item.add_user(user)
-
                     logger.debug('add %s to local user', id)
                     add_record('additem', item.id, file.info)
                     add_record('edititem', item.id, item.meta)
@@ -194,11 +196,10 @@ def run_scan():
         library_items = set([str(i) for i in user.library.items])
         gone = library_items - ids
         if gone:
-            logger.debug('cleaning up %s deleted records', len(gone))
             for id in gone:
                 i = Item.get(id)
                 path = i.get_path()
-                if path and not os.path.exists(path):
+                if not path or not os.path.exists(path):
                     logger.debug('cleaning orphaned record %s %s', i, path)
                     i.remove_file()
         missing = ids - library_items
diff --git a/oml/library.py b/oml/library.py
index d61398f..54902d1 100644
--- a/oml/library.py
+++ b/oml/library.py
@@ -288,7 +288,7 @@ class Peer(object):
                             l.remove_items(lremove, commit=False)
                         if ladd or lremove:
                             logger.debug('update list %s', l.name)
-                    else:
+                    elif self.info['lists'][l.name]:
                         l.add_items(self.info['lists'][l.name], commit=False)
                         update_items = list(set(update_items) - set(self.info['lists'][l.name]))
                         logger.debug('update list %s', l.name)
diff --git a/static/js/utils.js b/static/js/utils.js
index fc7186f..388c453 100644
--- a/static/js/utils.js
+++ b/static/js/utils.js
@@ -1028,7 +1028,7 @@ oml.updateDebugMenu = function() {
     oml.user.ui.showDebugMenu ? menu.show() : menu.hide();
 };
 
-oml.supportedExtensions = ['pdf', 'epub', 'kepub', 'cbr', 'cbz'];
+oml.supportedExtensions = ['pdf', 'epub', 'kepub', 'cbr', 'cbz', 'txt'];
 
 oml.upload = function(fileslist, callback) {
     var files = [], ids = [];