diff --git a/weboob/applications/qboobmsg/messages_manager.py b/weboob/applications/qboobmsg/messages_manager.py
index c3a392d9..883ea0a6 100644
--- a/weboob/applications/qboobmsg/messages_manager.py
+++ b/weboob/applications/qboobmsg/messages_manager.py
@@ -82,6 +82,7 @@ class MessagesManager(QWidget):
     def _gotMessage(self, backend, message):
         if message is None:
             self.ui.backendsList.setEnabled(True)
+            self.process = None
             return
 
         item = QTreeWidgetItem(None, [time.strftime('%Y-%m-%d %H:%M:%S', message.get_date().timetuple()),
diff --git a/weboob/applications/qhavesex/contacts.py b/weboob/applications/qhavesex/contacts.py
index af31f890..8a8dc90f 100644
--- a/weboob/applications/qhavesex/contacts.py
+++ b/weboob/applications/qhavesex/contacts.py
@@ -67,14 +67,15 @@ class ContactThread(QWidget):
         else:
             command = 'iter_messages'
 
-        self.process = QtDo(self.weboob, self.gotMessage)
-        self.process.do_backends(self.contact.backend, command, thread=self.contact.id)
+        self.process_msg = QtDo(self.weboob, self.gotMessage)
+        self.process_msg.do_backends(self.contact.backend, command, thread=self.contact.id)
 
     def gotMessage(self, backend, message):
         if not message:
             v = self.ui.scrollArea.verticalScrollBar()
             print v.minimum(), v.value(), v.maximum(), v.sliderPosition()
             self.ui.scrollArea.verticalScrollBar().setValue(self.ui.scrollArea.verticalScrollBar().maximum())
+            self.process_msg = None
             return
 
         widget = ThreadMessage(message)
@@ -91,14 +92,15 @@ class ContactThread(QWidget):
         text = unicode(self.ui.textEdit.toPlainText())
         self.ui.textEdit.setEnabled(False)
         self.ui.sendButton.setEnabled(False)
-        self.process = QtDo(self.weboob, self.replyPosted, self.replyNotPosted)
-        self.process.do_backends(self.contact.backend, 'post_reply', self.contact.id, 0, '', text)
+        self.process_reply = QtDo(self.weboob, self.replyPosted, self.replyNotPosted)
+        self.process_reply.do_backends(self.contact.backend, 'post_reply', self.contact.id, 0, '', text)
 
     def replyPosted(self, backend, ignored):
         self.ui.textEdit.clear()
         self.ui.textEdit.setEnabled(True)
         self.ui.sendButton.setEnabled(True)
         self.refreshMessages()
+        self.process_reply = None
 
     def replyNotPosted(self, backend, error, backtrace):
         content = unicode(self.tr('Unable to send message:\n%s\n')) % error
@@ -142,6 +144,8 @@ class MetaGroup(IGroup):
     def cb(self, cb, backend, contact):
         if contact:
             contact.backend = backend
+        else:
+            self.process = None
         cb(contact)
 
 class ContactsWidget(QWidget):
diff --git a/weboob/applications/qvideoob/main_window.py b/weboob/applications/qvideoob/main_window.py
index c2e8bcf2..62d72d07 100644
--- a/weboob/applications/qvideoob/main_window.py
+++ b/weboob/applications/qvideoob/main_window.py
@@ -88,6 +88,7 @@ class MainWindow(QtMainWindow):
     def addVideo(self, backend, video):
         if not backend:
             self.ui.searchEdit.setEnabled(True)
+            self.process = None
             return
         minivideo = MiniVideo(backend, video)
         self.ui.scrollAreaContent.layout().addWidget(minivideo)