diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -51,3 +51,4 @@ 19785af352684884f94566785ba1b13b3ddc5216
 757b4ada4ca121db4296b13ec0df491645db8fd0 3.5.0
 3da1a2d02072eec5419956265dcd8c7f47155c12 4.0.0
 da8f0f9d5099ee8b22aa317b91beb06543011f1d 4.1.0
+9619ecc0f79b705c94b3ac873896809eaf7779a6 4.1.1
diff --git a/boards/abstracts/sync_filters.py b/boards/abstracts/sync_filters.py
--- a/boards/abstracts/sync_filters.py
+++ b/boards/abstracts/sync_filters.py
@@ -1,8 +1,11 @@
 import xml.etree.ElementTree as et
 
-from boards.models import Post
+from boards.models import Post, Tag
 
 TAG_THREAD = 'thread'
+TAG_TAGS = 'tags'
+TAG_TAG = 'tag'
+TAG_TIME_FROM = 'timestamp_from'
 
 
 class PostFilter:
@@ -29,3 +32,35 @@ class ThreadFilter(PostFilter):
     def add_filter(self, model_tag, value):
         thread_tag = et.SubElement(model_tag, TAG_THREAD)
         thread_tag.text = str(value)
+
+
+class TagsFilter(PostFilter):
+    def filter(self, posts):
+        tags = []
+        for tag_tag in self.content:
+            try:
+                tags.append(Tag.objects.get(name=tag_tag.text))
+            except Tag.DoesNotExist:
+                pass
+
+        if tags:
+            return posts.filter(thread__tags__in=tags)
+        else:
+            return posts.none()
+
+    def add_filter(self, model_tag, value):
+        tags_tag = et.SubElement(model_tag, TAG_TAGS)
+        for tag_name in value:
+            tag_tag = et.SubElement(tags_tag, TAG_TAG)
+            tag_tag.text = tag_name
+
+
+class TimestampFromFilter(PostFilter):
+    def filter(self, posts):
+        from_time = self.content.text
+        return posts.filter(pub_time__gt=from_time)
+
+    def add_filter(self, model_tag, value):
+        tags_from_time = et.SubElement(model_tag, TAG_TIME_FROM)
+        tags_from_time.text = value
+
diff --git a/boards/config/default_settings.ini b/boards/config/default_settings.ini
--- a/boards/config/default_settings.ini
+++ b/boards/config/default_settings.ini
@@ -1,5 +1,5 @@
 [Version]
-Version = 4.1.0 2017
+Version = 4.1.1 2017
 SiteName = Neboard DEV
 
 [Cache]
diff --git a/boards/management/commands/sync_with_server.py b/boards/management/commands/sync_with_server.py
--- a/boards/management/commands/sync_with_server.py
+++ b/boards/management/commands/sync_with_server.py
@@ -26,6 +26,10 @@ class Command(BaseCommand):
                                  ' number of posts in one')
         parser.add_argument('--thread', type=int,
                             help='Get posts of one specific thread')
+        parser.add_argument('--tags', type=str,
+                help='Get posts of the tags, comma-separated')
+        parser.add_argument('--time-from', type=str,
+                help='Get posts from the given timestamp')
 
     def handle(self, *args, **options):
         logger = logging.getLogger('boards.sync')
@@ -57,9 +61,19 @@ class Command(BaseCommand):
         else:
             logger.info('Running LIST request...')
             h = httplib2.Http()
+
+            tags = []
+            tags_str = options.get('tags')
+            if tags_str:
+                tags = tags_str.split(',')
+
             xml = SyncManager.generate_request_list(
-                opening_post=options.get('thread'))
+                opening_post=options.get('thread'), tags=tags,
+                timestamp_from=options.get('time_from')).encode()
             response, content = h.request(list_url, method="POST", body=xml)
+            if response.status != 200:
+                raise Exception('Server returned error {}'.format(response.status))
+
             logger.info('Processing response...')
 
             root = ET.fromstring(content)
@@ -93,6 +107,8 @@ class Command(BaseCommand):
                         logger.info('Processing response...')
 
                         SyncManager.parse_response_get(content, file_url)
+
+                        logger.info('Sync completed successfully')
                 else:
                     logger.info('Nothing to get, everything synced')
             else:
diff --git a/boards/models/post/sync.py b/boards/models/post/sync.py
--- a/boards/models/post/sync.py
+++ b/boards/models/post/sync.py
@@ -3,7 +3,8 @@ import logging
 from xml.etree import ElementTree
 
 from boards.abstracts.exceptions import SyncException
-from boards.abstracts.sync_filters import ThreadFilter
+from boards.abstracts.sync_filters import ThreadFilter, TagsFilter,\
+        TimestampFromFilter
 from boards.models import KeyPair, GlobalId, Signature, Post, Tag
 from boards.models.attachment.downloaders import download
 from boards.models.signature import TAG_REQUEST, ATTR_TYPE, TYPE_GET, \
@@ -17,6 +18,7 @@ EXCEPTION_DOWNLOAD = 'File was not downl
 EXCEPTION_HASH = 'File hash does not match attachment hash.'
 EXCEPTION_SIGNATURE = 'Invalid model signature for {}.'
 EXCEPTION_AUTHOR_SIGNATURE = 'Model {} has no author signature.'
+EXCEPTION_THREAD = 'No thread exists for post {}'
 ENCODING_UNICODE = 'unicode'
 
 TAG_MODEL = 'model'
@@ -193,7 +195,7 @@ class SyncManager:
         version = int(tag_content.find(TAG_VERSION).text)
         is_old = exists and global_id.post.version < version
         if exists and not is_old:
-            print('Post with same ID exists and is up to date.')
+            logger.debug('Post {} exists and is up to date.'.format(global_id))
         else:
             global_id.content = content_str
             global_id.save()
@@ -218,7 +220,7 @@ class SyncManager:
                 if exists:
                     opening_post = Post.objects.get(global_id=op_global_id)
                 else:
-                    logger.debug('No thread exists for post {}'.format(global_id))
+                    raise Exception(EXCEPTION_THREAD.format(global_id))
             else:
                 opening_post = None
                 tag_tags = tag_content.find(TAG_TAGS)
@@ -339,7 +341,51 @@ class SyncManager:
                 attachment_tag.set(ATTR_ID_TYPE, ID_TYPE_URL)
                 attachment_tag.text = attachment.url
 
-        if tag_refs is not None:
+        if tag_refs is not None and attachment.is_internal():
             attachment_ref = et.SubElement(tag_refs, TAG_ATTACHMENT_REF)
             attachment_ref.set(ATTR_REF, attachment.hash)
-            attachment_ref.set(ATTR_URL, attachment.file.url)	
+            attachment_ref.set(ATTR_URL, attachment.file.url)
+
+    @staticmethod
+    def generate_request_get(global_id_list: list):
+        """
+        Form a get request from a list of ModelId objects.
+        """
+
+        request = et.Element(TAG_REQUEST)
+        request.set(ATTR_TYPE, TYPE_GET)
+        request.set(ATTR_VERSION, '1.0')
+
+        model = et.SubElement(request, TAG_MODEL)
+        model.set(ATTR_VERSION, '1.0')
+        model.set(ATTR_NAME, 'post')
+
+        for global_id in global_id_list:
+            tag_id = et.SubElement(model, TAG_ID)
+            global_id.to_xml_element(tag_id)
+
+        return et.tostring(request, 'unicode')
+
+    @staticmethod
+    def generate_request_list(opening_post=None, tags=list(),
+            timestamp_from=None):
+        """
+        Form a pull request from a list of ModelId objects.
+        """
+
+        request = et.Element(TAG_REQUEST)
+        request.set(ATTR_TYPE, TYPE_LIST)
+        request.set(ATTR_VERSION, '1.0')
+
+        model = et.SubElement(request, TAG_MODEL)
+        model.set(ATTR_VERSION, '1.0')
+        model.set(ATTR_NAME, 'post')
+
+        if opening_post:
+            ThreadFilter().add_filter(model, opening_post)
+        if tags:
+            TagsFilter().add_filter(model, tags)
+        if timestamp_from:
+            TimestampFromFilter().add_filter(model, timestamp_from)
+
+        return et.tostring(request, 'unicode')
diff --git a/boards/tests/test_sync.py b/boards/tests/test_sync.py
--- a/boards/tests/test_sync.py
+++ b/boards/tests/test_sync.py
@@ -212,3 +212,42 @@ class SyncTest(TestCase):
             in response_thread,
             'Wrong response generated for the LIST request for posts of '
             'non-existing thread.')
+
+    def test_list_pub_time(self):
+        key = KeyPair.objects.generate_key(primary=True)
+        tag = Tag.objects.create(name='tag1')
+        post = Post.objects.create_post(title='test_title',
+                                        text='test_text\rline two',
+                                        tags=[tag])
+        post2 = Post.objects.create_post(title='test title 2',
+                                         text='test text 2',
+                                         tags=[tag])
+
+        request_thread = MockRequest()
+        request_thread.body = (
+            '<request type="list" version="1.0">'
+            '<model name="post" version="1.0">'
+            '<timestamp_from>{}</timestamp_from>'
+            '</model>'
+            '</request>'.format(
+                post.pub_time,
+            )
+        )
+
+        response_thread = response_list(request_thread).content.decode()
+        self.assertTrue(
+            '<status>success</status>'
+            '<models>'
+            '<model>'
+            '<id key="{}" local-id="{}" type="{}" />'
+            '<version>{}</version>'
+            '</model>'
+            '</models>'.format(
+                post2.global_id.key,
+                post2.global_id.local_id,
+                post2.global_id.key_type,
+                post2.version,
+            ) in response_thread,
+            'Wrong response generated for the LIST request for posts of '
+            'existing thread.')
+
diff --git a/boards/utils.py b/boards/utils.py
--- a/boards/utils.py
+++ b/boards/utils.py
@@ -117,7 +117,7 @@ def get_file_hash(file) -> str:
 
 def validate_file_size(size: int):
     max_size = boards.settings.get_int('Forms', 'MaxFileSize')
-    if size > max_size:
+    if max_size > 0 and size > max_size:
         raise forms.ValidationError(
             _('File must be less than %s but is %s.')
             % (filesizeformat(max_size), filesizeformat(size)))
diff --git a/boards/views/landing.py b/boards/views/landing.py
--- a/boards/views/landing.py
+++ b/boards/views/landing.py
@@ -29,10 +29,14 @@ class LandingView(BaseBoardView):
                 Tag.objects.filter(required=True))
 
         today = datetime.now() - timedelta(1)
-        max_landing_threads = settings.get_int('View', 'MaxFavoriteThreads')
         ops = Post.objects.filter(thread__replies__pub_time__gt=today, opening=True, thread__status=STATUS_ACTIVE)\
                   .annotate(today_post_count=Count('thread__replies'))\
-                  .order_by('-pub_time')[:max_landing_threads]
+                  .order_by('-pub_time')
+
+        max_landing_threads = settings.get_int('View', 'MaxFavoriteThreads')
+        if max_landing_threads > 0:
+            ops = ops[:max_landing_threads]
+
         params[PARAM_LATEST_THREADS] = ops
 
         params[PARAM_IMAGES] = Attachment.objects.get_random_images(
diff --git a/boards/views/search.py b/boards/views/search.py
--- a/boards/views/search.py
+++ b/boards/views/search.py
@@ -1,5 +1,6 @@
 from django.shortcuts import render
 from django.views.generic import View
+from django.db.models import Q
 
 from boards.abstracts.paginator import get_paginator
 from boards.forms import SearchForm, PlainErrorList
@@ -32,8 +33,8 @@ class BoardSearchView(View):
         if form.is_valid():
             query = form.cleaned_data[FORM_QUERY]
             if len(query) >= MIN_QUERY_LENGTH:
-                results = Post.objects.filter(text__icontains=query)\
-                        .order_by('-id')
+                results = Post.objects.filter(Q(text__icontains=query) |
+                        Q(title__icontains=query)).order_by('-id')
                 paginator = get_paginator(results, RESULTS_PER_PAGE)
 
                 page = int(request.GET.get(REQUEST_PAGE, '1'))
diff --git a/boards/views/sync.py b/boards/views/sync.py
--- a/boards/views/sync.py
+++ b/boards/views/sync.py
@@ -4,7 +4,9 @@ import xml.etree.ElementTree as et
 
 from django.http import HttpResponse, Http404
 
-from boards.abstracts.sync_filters import ThreadFilter, TAG_THREAD
+from boards.abstracts.sync_filters import ThreadFilter, TagsFilter,\
+        TimestampFromFilter,\
+        TAG_THREAD, TAG_TAGS, TAG_TIME_FROM
 from boards.models import GlobalId, Post
 from boards.models.post.sync import SyncManager
 
@@ -14,6 +16,8 @@ logger = logging.getLogger('boards.sync'
 
 FILTERS = {
         TAG_THREAD: ThreadFilter,
+        TAG_TAGS: TagsFilter,
+        TAG_TIME_FROM: TimestampFromFilter,
 }
 
 
@@ -30,10 +34,10 @@ def response_list(request):
 
         for tag_filter in model_tag:
             filter_name = tag_filter.tag
-            model_filter = FILTERS.get(filter_name)(tag_filter)
+            model_filter = FILTERS.get(filter_name)
             if not model_filter:
                 logger.warning('Unavailable filter: {}'.format(filter_name))
-            filters.append(model_filter)
+            filters.append(model_filter(tag_filter))
 
     response_xml = SyncManager.generate_response_list(filters)