diff --git a/frontends/src/quick_frontend/quick_chat_list.py b/frontends/src/quick_frontend/quick_chat_list.py
index 271cbad8..18544845 100644
--- a/frontends/src/quick_frontend/quick_chat_list.py
+++ b/frontends/src/quick_frontend/quick_chat_list.py
@@ -28,9 +28,9 @@ class QuickChatList(dict):
         dict.__init__(self)
         self.host = host
 
-    def __getitem__(self,to_jid):
-        target=JID(to_jid)
-        if not self.has_key(target.short):
+    def __getitem__(self, to_jid):
+        target = JID(to_jid)
+        if not target.short in self:
             #we have to create the chat win
             self[target.short] = self.createChat(target)
         return dict.__getitem__(self, target.short)
diff --git a/src/core/exceptions.py b/src/core/exceptions.py
index 1c171856..1130e481 100644
--- a/src/core/exceptions.py
+++ b/src/core/exceptions.py
@@ -26,6 +26,13 @@ class ProfileNotInCacheError(Exception):
     pass
 
 
+class ProfileNotSetError(Exception):
+    """
+    This error raises when no profile has been set (value @NONE@ is found, but it should have been replaced)
+    """
+    pass
+
+
 class NotConnectedProfileError(Exception):
     pass
 
diff --git a/src/memory/memory.py b/src/memory/memory.py
index f4a8959d..37d4c9ff 100644
--- a/src/memory/memory.py
+++ b/src/memory/memory.py
@@ -195,6 +195,8 @@ class Params(object):
                     info(_('No profile exist yet'))
                     return ""
             return default  # FIXME: temporary, must use real default value, and fallback to first one if it doesn't exists
+        elif profile_key == '@NONE@':
+            raise exceptions.ProfileNotSetError
         if not self.storage.hasProfile(profile_key):
             info(_('Trying to access an unknown profile'))
             return ""
@@ -275,11 +277,11 @@ class Params(object):
             return "true" if result else "false"
         return result
 
-    def getStringParamA(self, name, category, attr="value", profile_key="@DEFAULT@"):
+    def getStringParamA(self, name, category, attr="value", profile_key="@NONE@"):
         """ Same as getParamA but for bridge: convert non string value to string """
         return self.__type_to_string(self.getParamA(name, category, attr, profile_key))
 
-    def getParamA(self, name, category, attr="value", profile_key="@DEFAULT@"):
+    def getParamA(self, name, category, attr="value", profile_key="@NONE@"):
         """Helper method to get a specific attribute
            @param name: name of the parameter
            @param category: category of the parameter
@@ -312,12 +314,12 @@ class Params(object):
             value = self.__getParam(profile, category, name)
             return self.__getAttr(node[1], attr, value)
 
-    def asyncGetStringParamA(self, name, category, attr="value", profile_key="@DEFAULT@"):
+    def asyncGetStringParamA(self, name, category, attr="value", profile_key="@NONE@"):
         d = self.asyncGetParamA(name, category, attr, profile_key)
         d.addCallback(self.__type_to_string)
         return d
 
-    def asyncGetParamA(self, name, category, attr="value", profile_key="@DEFAULT@"):
+    def asyncGetParamA(self, name, category, attr="value", profile_key="@NONE@"):
         """Helper method to get a specific attribute
            @param name: name of the parameter
            @param category: category of the parameter
@@ -678,7 +680,8 @@ class Memory(object):
         param_file_xml = os.path.expanduser(self.getConfig('', 'local_dir') +
                                             self.host.get_const('savefile_param_xml'))
 
-        self.params.save_xml(param_file_xml)
+        # TODO: check if this method is still needed
+        #self.params.save_xml(param_file_xml)
         debug(_("params saved"))
 
     def getProfilesList(self):
@@ -894,16 +897,16 @@ class Memory(object):
 
         return self.subscriptions[profile]
 
-    def getStringParamA(self, name, category, attr="value", profile_key='@DEFAULT@'):
+    def getStringParamA(self, name, category, attr="value", profile_key='@NONE@'):
         return self.params.getStringParamA(name, category, attr, profile_key)
 
-    def getParamA(self, name, category, attr="value", profile_key='@DEFAULT@'):
+    def getParamA(self, name, category, attr="value", profile_key='@NONE@'):
         return self.params.getParamA(name, category, attr, profile_key)
 
-    def asyncGetParamA(self, name, category, attr="value", profile_key='@DEFAULT@'):
+    def asyncGetParamA(self, name, category, attr="value", profile_key='@NONE@'):
         return self.params.asyncGetParamA(name, category, attr, profile_key)
 
-    def asyncGetStringParamA(self, name, category, attr="value", profile_key='@DEFAULT@'):
+    def asyncGetStringParamA(self, name, category, attr="value", profile_key='@NONE@'):
         return self.params.asyncGetStringParamA(name, category, attr, profile_key)
 
     def getParamsUI(self, security_limit, profile_key):
diff --git a/src/plugins/plugin_xep_0054.py b/src/plugins/plugin_xep_0054.py
index 88442d8b..89031836 100755
--- a/src/plugins/plugin_xep_0054.py
+++ b/src/plugins/plugin_xep_0054.py
@@ -199,7 +199,8 @@ class XEP_0054(object):
 
     def vcard_err(self, failure, profile):
         """Called when something is wrong with registration"""
-        error(_("Can't find VCard of %s") % failure.value.stanza['from'])
+        if failure.value.stanza.hasAttribute("from"):
+            error(_("Can't find VCard of %s") % failure.value.stanza['from'])
         self.host.bridge.actionResult("SUPPRESS", failure.value.stanza['id'], {}, profile)  # FIXME: maybe an error message would be better
 
     def getCard(self, target_s, profile_key='@DEFAULT@'):