diff --git a/plugins/Stats/StatsPlugin.py b/plugins/Stats/StatsPlugin.py
index 38ea924f..3de71fc8 100644
--- a/plugins/Stats/StatsPlugin.py
+++ b/plugins/Stats/StatsPlugin.py
@@ -86,7 +86,7 @@ class UiRequestPlugin(object):
             len(main.file_server.connections), main.file_server.last_connection_id
         )
         yield "<table><tr> <th>id</th> <th>proto</th>  <th>type</th> <th>ip</th> <th>open</th> <th>crypt</th> <th>ping</th>"
-        yield "<th>buff</th> <th>idle</th> <th>open</th> <th>delay</th> <th>out</th> <th>in</th> <th>last sent</th>"
+        yield "<th>buff</th> <th>bad</th> <th>idle</th> <th>open</th> <th>delay</th> <th>out</th> <th>in</th> <th>last sent</th>"
         yield "<th>waiting</th> <th>version</th> <th>peerid</th> </tr>"
         for connection in main.file_server.connections:
             if "cipher" in dir(connection.sock):
@@ -102,6 +102,7 @@ class UiRequestPlugin(object):
                 ("<span title='%s'>%s</span>", (connection.crypt, cipher)),
                 ("%6.3f", connection.last_ping_delay),
                 ("%s", connection.incomplete_buff_recv),
+                ("%s", connection.bad_actions),
                 ("since", max(connection.last_send_time, connection.last_recv_time)),
                 ("since", connection.start_time),
                 ("%.3f", connection.last_sent_time - connection.last_send_time),
diff --git a/src/Config.py b/src/Config.py
index 9eacdb63..ae85be1a 100644
--- a/src/Config.py
+++ b/src/Config.py
@@ -8,7 +8,7 @@ class Config(object):
 
     def __init__(self, argv):
         self.version = "0.3.6"
-        self.rev = 989
+        self.rev = 1015
         self.argv = argv
         self.action = None
         self.config_file = "zeronet.conf"
@@ -119,6 +119,7 @@ class Config(object):
         self.parser.add_argument('--verbose', help='More detailed logging', action='store_true')
         self.parser.add_argument('--debug', help='Debug mode', action='store_true')
         self.parser.add_argument('--debug_socket', help='Debug socket connections', action='store_true')
+        self.parser.add_argument('--debug_gevent', help='Debug gevent functions', action='store_true')
 
         self.parser.add_argument('--batch', help="Batch mode (No interactive input for commands)", action='store_true')
 
@@ -150,7 +151,7 @@ class Config(object):
                                  type='bool', choices=[True, False], default=True)
         self.parser.add_argument('--keep_ssl_cert', help='Disable new SSL cert generation on startup', action='store_true')
         self.parser.add_argument('--max_files_opened', help='Change maximum opened files allowed by OS to this value on startup',
-                                 default=1024, type=int, metavar='limit')
+                                 default=2048, type=int, metavar='limit')
         self.parser.add_argument('--use_tempfiles', help='Use temporary files when downloading (experimental)',
                                  type='bool', choices=[True, False], default=False)
         self.parser.add_argument('--stream_downloads', help='Stream download directly to files (experimental)',
diff --git a/src/Connection/Connection.py b/src/Connection/Connection.py
index de67ee06..1a7b54b1 100644
--- a/src/Connection/Connection.py
+++ b/src/Connection/Connection.py
@@ -17,7 +17,7 @@ class Connection(object):
         "sock", "sock_wrapped", "ip", "port", "cert_pin", "site_lock", "id", "protocol", "type", "server", "unpacker", "req_id",
         "handshake", "crypt", "connected", "event_connected", "closed", "start_time", "last_recv_time",
         "last_message_time", "last_send_time", "last_sent_time", "incomplete_buff_recv", "bytes_recv", "bytes_sent",
-        "last_ping_delay", "last_req_time", "last_cmd", "name", "updateName", "waiting_requests", "waiting_streams"
+        "last_ping_delay", "last_req_time", "last_cmd", "bad_actions", "name", "updateName", "waiting_requests", "waiting_streams"
     )
 
     def __init__(self, server, ip, port, sock=None, site_lock=None):
@@ -56,6 +56,7 @@ class Connection(object):
         self.last_ping_delay = None
         self.last_req_time = 0
         self.last_cmd = None
+        self.bad_actions = 0
 
         self.name = None
         self.updateName()
@@ -75,6 +76,12 @@ class Connection(object):
     def log(self, text):
         self.server.log.debug("%s > %s" % (self.name, text))
 
+    def badAction(self, weight=1):
+        self.bad_actions += weight
+
+    def goodAction(self):
+        self.bad_actions = 0
+
     # Open connection to peer and wait for handshake
     def connect(self):
         self.log("Connecting...")
diff --git a/src/Connection/ConnectionServer.py b/src/Connection/ConnectionServer.py
index 23f90482..6412ad30 100644
--- a/src/Connection/ConnectionServer.py
+++ b/src/Connection/ConnectionServer.py
@@ -164,7 +164,9 @@ class ConnectionServer:
             self.connections.remove(connection)
 
     def checkConnections(self):
+        run_i = 0
         while self.running:
+            run_i += 1
             time.sleep(60)  # Check every minute
             self.ip_incoming = {}  # Reset connected ips counter
             self.broken_ssl_peer_ids = {}  # Reset broken ssl peerids count
@@ -205,3 +207,11 @@ class ConnectionServer:
                 elif idle > 60 and connection.protocol == "?":  # No connection after 1 min
                     connection.log("[Cleanup] Connect timeout: %s" % idle)
                     connection.close()
+
+                elif idle < 60 and connection.bad_actions > 40:
+                    connection.log("[Cleanup] Too many bad actions: %s" % connection.bad_actions)
+                    connection.close()
+
+                elif run_i % 30 == 0:
+                    # Reset bad action counter every 30 min
+                    connection.bad_actions = 0
diff --git a/src/Db/Db.py b/src/Db/Db.py
index e6c64bec..e5f0b06e 100644
--- a/src/Db/Db.py
+++ b/src/Db/Db.py
@@ -7,6 +7,7 @@ import os
 import gevent
 
 from DbCursor import DbCursor
+from Config import config
 
 opened_dbs = []
 
@@ -45,7 +46,7 @@ class Db(object):
     def connect(self):
         if self not in opened_dbs:
             opened_dbs.append(self)
-
+        s = time.time()
         self.log.debug("Connecting to %s (sqlite version: %s)..." % (self.db_path, sqlite3.version))
         if not os.path.isdir(self.db_dir):  # Directory not exist yet
             os.makedirs(self.db_dir)
@@ -53,6 +54,8 @@ class Db(object):
         if not os.path.isfile(self.db_path):
             self.log.debug("Db file not exist yet: %s" % self.db_path)
         self.conn = sqlite3.connect(self.db_path)
+        if config.verbose:
+            self.log.debug("Connected to Db in %.3fs" % (time.time()-s))
         self.conn.row_factory = sqlite3.Row
         self.conn.isolation_level = None
         self.cur = self.getCursor()
@@ -62,6 +65,8 @@ class Db(object):
         self.cur.execute("PRAGMA synchronous = OFF")
         if self.foreign_keys:
             self.execute("PRAGMA foreign_keys = ON")
+        if config.verbose:
+            self.log.debug("Db is ready to use in %.3fs" % (time.time()-s))
 
 
     # Execute query using dbcursor
@@ -312,4 +317,4 @@ if __name__ == "__main__":
     cur.execute("COMMIT")
     print "Done in %.3fs" % (time.time() - s)
     for query, stats in sorted(dbjson.query_stats.items()):
-        print "-", query, stats
+        print "-", query, stats
\ No newline at end of file
diff --git a/src/Debug/Debug.py b/src/Debug/Debug.py
index f3b54fd7..050adf4c 100644
--- a/src/Debug/Debug.py
+++ b/src/Debug/Debug.py
@@ -1,6 +1,7 @@
 import sys
 import os
 import traceback
+from Config import config
 
 
 # Non fatal exception
@@ -28,6 +29,21 @@ def formatException(err=None, format="text"):
     else:
         return "%s: %s in %s" % (exc_type.__name__, err, " > ".join(tb))
 
+# Test if gevent eventloop blocks
+if config.debug_gevent:
+    import logging
+    import gevent
+    import time
+    def testBlock():
+        logging.debug("Gevent block checker started")
+        last_time = time.time()
+        while 1:
+            time.sleep(1)
+            if time.time()-last_time > 1.1:
+                logging.debug("Gevent block detected: %s" % (time.time()-last_time-1))
+            last_time = time.time()
+    gevent.spawn(testBlock)
+
 
 if __name__ == "__main__":
     try:
diff --git a/src/Debug/DebugHook.py b/src/Debug/DebugHook.py
index 1bb8e1e4..cfd97252 100644
--- a/src/Debug/DebugHook.py
+++ b/src/Debug/DebugHook.py
@@ -8,6 +8,13 @@ from Config import config
 
 last_error = None
 
+def shutdown():
+    try:
+        gevent.spawn(sys.modules["main"].file_server.stop)
+        gevent.spawn(sys.modules["main"].ui_server.stop)
+    except Exception, err:
+        print "Proper shutdown error: %s" % err
+        sys.exit(0)
 
 # Store last error, ignore notify, allow manual error logging
 def handleError(*args):
@@ -19,6 +26,8 @@ def handleError(*args):
         silent = False
     if args[0].__name__ != "Notify":
         last_error = args
+    if args[0].__name__ == "KeyboardInterrupt":
+        shutdown()
     if not silent and args[0].__name__ != "Notify":
         logging.exception("Unhandled exception")
         sys.__excepthook__(*args)
@@ -26,6 +35,8 @@ def handleError(*args):
 
 # Ignore notify errors
 def handleErrorNotify(*args):
+    if args[0].__name__ == "KeyboardInterrupt":
+        shutdown()
     if args[0].__name__ != "Notify":
         logging.exception("Unhandled exception")
         sys.__excepthook__(*args)
diff --git a/src/File/FileRequest.py b/src/File/FileRequest.py
index 19b68ae2..68163f7b 100644
--- a/src/File/FileRequest.py
+++ b/src/File/FileRequest.py
@@ -57,14 +57,16 @@ class FileRequest(object):
         if "site" in params and self.connection.site_lock and self.connection.site_lock not in (params["site"], "global"):
             self.response({"error": "Invalid site"})
             self.log.error("Site lock violation: %s != %s" % (self.connection.site_lock != params["site"]))
+            self.connection.badAction(5)
             return False
 
         if cmd == "update":
             event = "%s update %s %s" % (self.connection.id, params["site"], params["inner_path"])
             if not RateLimit.isAllowed(event):  # There was already an update for this file in the last 10 second
+                time.sleep(5)
                 self.response({"ok": "File update queued"})
             # If called more than once within 10 sec only keep the last update
-            RateLimit.callAsync(event, 10, self.actionUpdate, params)
+            RateLimit.callAsync(event, max(self.connection.bad_actions, 10), self.actionUpdate, params)
         else:
             func_name = "action" + cmd[0].upper() + cmd[1:]
             func = getattr(self, func_name, None)
@@ -81,8 +83,8 @@ class FileRequest(object):
             return False
         if site.settings["own"] and params["inner_path"].endswith("content.json"):
             self.log.debug(
-                "Someone trying to push a file to own site %s, reload local %s first" %
-                (site.address, params["inner_path"])
+                "%s pushing a file to own site %s, reloading local %s first" %
+                (self.connection.ip, site.address, params["inner_path"])
             )
             changed, deleted = site.content_manager.loadContent(params["inner_path"], add_bad_files=False)
             if changed or deleted:  # Content.json changed locally
@@ -107,6 +109,7 @@ class FileRequest(object):
                 )
 
             self.response({"ok": "Thanks, file %s updated!" % params["inner_path"]})
+            self.connection.goodAction()
 
         elif valid is None:  # Not changed
             if params.get("peer"):
@@ -125,10 +128,12 @@ class FileRequest(object):
                         site.needFile(task["inner_path"], peer=peer, update=True, blocking=False)
 
             self.response({"ok": "File not changed"})
+            self.connection.badAction()
 
         else:  # Invalid sign or sha1 hash
             self.log.debug("Update for %s is invalid" % params["inner_path"])
             self.response({"error": "File invalid"})
+            self.connection.badAction(5)
 
     # Send file content request
     def actionGetFile(self, params):
@@ -302,6 +307,7 @@ class FileRequest(object):
         site = self.sites.get(params["site"])
         if not site or not site.settings["serving"]:  # Site unknown or not serving
             self.response({"error": "Unknown site"})
+            self.connection.badAction(5)
             return False
 
         found = site.worker_manager.findOptionalHashIds(params["hash_ids"])
@@ -340,6 +346,7 @@ class FileRequest(object):
         site = self.sites.get(params["site"])
         if not site or not site.settings["serving"]:  # Site unknown or not serving
             self.response({"error": "Unknown site"})
+            self.connection.badAction(5)
             return False
 
         peer = site.addPeer(self.connection.ip, self.connection.port, return_peer=True, connection=self.connection)  # Add or get peer
@@ -375,3 +382,4 @@ class FileRequest(object):
     # Unknown command
     def actionUnknown(self, cmd, params):
         self.response({"error": "Unknown command: %s" % cmd})
+        self.connection.badAction(5)
diff --git a/src/Site/Site.py b/src/Site/Site.py
index 9580bbe8..8dbb4c48 100644
--- a/src/Site/Site.py
+++ b/src/Site/Site.py
@@ -362,8 +362,8 @@ class Site(object):
         threads = 5
         if limit == "default":
             if len(self.peers) > 50:
-                limit = 4
-                threads = 4
+                limit = 3
+                threads = 3
             else:
                 limit = 5
 
diff --git a/src/Site/SiteStorage.py b/src/Site/SiteStorage.py
index 8e1fad75..e6ca58a4 100644
--- a/src/Site/SiteStorage.py
+++ b/src/Site/SiteStorage.py
@@ -262,11 +262,15 @@ class SiteStorage:
     # Verify all files sha512sum using content.json
     def verifyFiles(self, quick_check=False, add_optional=False, add_changed=True):
         bad_files = []
+        i = 0
 
         if not self.site.content_manager.contents.get("content.json"):  # No content.json, download it first
             self.site.needFile("content.json", update=True)  # Force update to fix corrupt file
             self.site.content_manager.loadContent()  # Reload content.json
         for content_inner_path, content in self.site.content_manager.contents.items():
+            i += 1
+            if i % 100 == 0:
+                time.sleep(0.0001)  # Context switch to avoid gevent hangs
             if not os.path.isfile(self.getPath(content_inner_path)):  # Missing content.json file
                 self.log.debug("[MISSING] %s" % content_inner_path)
                 bad_files.append(content_inner_path)
@@ -324,6 +328,7 @@ class SiteStorage:
                     (content_inner_path, len(content["files"]), quick_check, bad_files, optional_added, optional_removed)
                 )
 
+        time.sleep(0.0001)  # Context switch to avoid gevent hangs
         return bad_files
 
     # Check and try to fix site files integrity
diff --git a/src/Ui/media/Wrapper.coffee b/src/Ui/media/Wrapper.coffee
index b675d946..ab613eab 100644
--- a/src/Ui/media/Wrapper.coffee
+++ b/src/Ui/media/Wrapper.coffee
@@ -70,7 +70,8 @@ class Wrapper
 
 	# Incoming message from inner frame
 	onMessageInner: (e) =>
-		if not window.postmessage_nonce_security and @opener == null  # Test opener
+		# No nonce security enabled, test if window opener present
+		if not window.postmessage_nonce_security and @opener == null
 			if window.opener
 				@log "Opener present", window.opener
 				@displayOpenerDialog()
@@ -79,14 +80,17 @@ class Wrapper
 				@opener = false
 
 		message = e.data
+		# Invalid message (probably not for us)
 		if not message.cmd
 			return false
 
+		# Test nonce security to avoid third-party messages
 		if window.postmessage_nonce_security and message.wrapper_nonce != window.wrapper_nonce
 			@log "Message nonce error:", message.wrapper_nonce, '!=', window.wrapper_nonce
 			@actionNotification({"params": ["error", "Message wrapper_nonce error, please report!"]})
 			window.removeEventListener("message", @onMessageInner)
 			return
+
 		cmd = message.cmd
 		if cmd == "innerReady"
 			@inner_ready = true
diff --git a/src/Ui/template/wrapper.html b/src/Ui/template/wrapper.html
index 6dbb0c2f..54f2fcc5 100644
--- a/src/Ui/template/wrapper.html
+++ b/src/Ui/template/wrapper.html
@@ -34,7 +34,7 @@ if (window.opener && window.stop) window.stop()
 <div class='fixbutton'>
  <div class='fixbutton-text'>0</div>
  <div class='fixbutton-burger'>&#x2261;</div>
- <a class='fixbutton-bg' href="{homepage}"></a>
+ <a class='fixbutton-bg' href="{homepage}/"></a>
 </div>
 
 
@@ -55,7 +55,7 @@ if (window.opener && window.stop) window.stop()
 
 
 <!-- Site Iframe -->
-<iframe src='about:blank' id='inner-iframe' sandbox="allow-forms allow-scripts allow-top-navigation allow-popups {sandbox_permissions}"></iframe>
+<iframe src='about:blank' id='inner-iframe' sandbox="allow-forms allow-scripts allow-top-navigation allow-popups allow-popups-to-escape-sandbox {sandbox_permissions}"></iframe>
 
 <!-- Site info -->
 <script>
diff --git a/zeronet.py b/zeronet.py
index fbfda76f..e54eb125 100755
--- a/zeronet.py
+++ b/zeronet.py
@@ -49,6 +49,7 @@ def main():
         # Restart
         gc.collect()  # Garbage collect
         print "Restarting..."
+        time.sleep(1)  # Wait files to close
         args = sys.argv[:]
         args.insert(0, sys.executable)
         if sys.platform == 'win32':