diff --git a/plugins/dice.py b/plugins/dice.py
index 376ed26a..55fd87a7 100644
--- a/plugins/dice.py
+++ b/plugins/dice.py
@@ -95,7 +95,7 @@ class Plugin(BasePlugin):
         is_muctab = isinstance(tab, tabs.MucTab)
         msg_id = tab.last_sent_message["id"]
         increment = self.config.get('refresh')
-        roll = DiceRoll(duration, num_dice, is_muctab, tab.name, msg_id,
+        roll = DiceRoll(duration, num_dice, is_muctab, tab.jid, msg_id,
                         increment)
         event = self.api.create_delayed_event(increment, self.delayed_event,
                                               roll)
diff --git a/plugins/irc.py b/plugins/irc.py
index eeef128c..9d981c91 100644
--- a/plugins/irc.py
+++ b/plugins/irc.py
@@ -376,7 +376,7 @@ class Plugin(BasePlugin):
         """
         gateway = self.config.get('gateway', 'irc.poez.io')
         current = self.api.current_tab()
-        current_jid = common.safeJID(current.name)
+        current_jid = current.jid
         if not current_jid.server == gateway:
             self.api.information(
                 'The current tab does not appear to be an IRC one', 'Warning')
diff --git a/plugins/marquee.py b/plugins/marquee.py
index bad06301..60566b0d 100644
--- a/plugins/marquee.py
+++ b/plugins/marquee.py
@@ -68,7 +68,7 @@ class Plugin(BasePlugin):
         tab.command_say(args)
         is_muctab = isinstance(tab, tabs.MucTab)
         msg_id = tab.last_sent_message["id"]
-        jid = tab.name
+        jid = tab.jid
 
         event = self.api.create_delayed_event(
             self.config.get("refresh"), self.delayed_event, jid, args, msg_id,
diff --git a/plugins/otr.py b/plugins/otr.py
index 909a4ea5..2ddc332b 100644
--- a/plugins/otr.py
+++ b/plugins/otr.py
@@ -325,7 +325,7 @@ def hl(tab):
     if tab.state != 'current':
         tab.state = 'private'
 
-    conv_jid = safeJID(tab.name)
+    conv_jid = tab.jid
     if 'private' in config.get('beep_on', 'highlight private').split():
         if not config.get_by_tabname(
                 'disable_beep', conv_jid.bare, default=False):
@@ -806,7 +806,7 @@ class Plugin(BasePlugin):
         On message sent
         """
         name = tab.name
-        jid = safeJID(tab.name)
+        jid = tab.jid
 
         format_dict = {
             'jid_c': '\x19%s}' % dump_tuple(get_theme().COLOR_MUC_JID),
@@ -846,7 +846,7 @@ class Plugin(BasePlugin):
         elif not is_relevant(tab) and ctx and (
                 ctx.state == STATE_ENCRYPTED
                 or ctx.getPolicy('REQUIRE_ENCRYPTION')):
-            contact = roster[tab.name]
+            contact = roster[tab.jid.bare]
             res = []
             if contact:
                 res = [resource.jid for resource in contact.resources]
@@ -884,13 +884,13 @@ class Plugin(BasePlugin):
             return self.core.command.help('otr')
         action = args.pop(0)
         tab = self.api.current_tab()
-        name = tab.name
+        name = tab.jid.full
         format_dict = {
             'jid_c': '\x19%s}' % dump_tuple(get_theme().COLOR_MUC_JID),
             'info': '\x19%s}' % dump_tuple(get_theme().COLOR_INFORMATION_TEXT),
             'normal': '\x19%s}' % dump_tuple(get_theme().COLOR_NORMAL_TEXT),
-            'jid': name,
-            'bare_jid': safeJID(name).bare
+            'jid': tab.jid.full,
+            'bare_jid': tab.jid.bare,
         }
 
         if action == 'end':  # close the session
@@ -991,12 +991,12 @@ class Plugin(BasePlugin):
             question = secret = None
 
         tab = self.api.current_tab()
-        name = tab.name
+        name = tab.jid.full
         format_dict = {
             'jid_c': '\x19%s}' % dump_tuple(get_theme().COLOR_MUC_JID),
             'info': '\x19%s}' % dump_tuple(get_theme().COLOR_INFORMATION_TEXT),
-            'jid': name,
-            'bare_jid': safeJID(name).bare
+            'jid': tab.jid.full,
+            'bare_jid': tab.jid.bare,
         }
 
         ctx = self.get_context(name)
diff --git a/plugins/ping.py b/plugins/ping.py
index 4868ccf9..b9bad4fe 100644
--- a/plugins/ping.py
+++ b/plugins/ping.py
@@ -22,6 +22,7 @@ Command
         the current interlocutor.
 """
 
+from slixmpp import InvalidJID
 from poezio.decorators import command_args_parser
 from poezio.plugin import BasePlugin
 from poezio.roster import roster
@@ -116,7 +117,7 @@ class Plugin(BasePlugin):
     def command_private_ping(self, arg):
         if arg:
             return self.command_ping(arg)
-        self.command_ping(self.api.current_tab().name)
+        self.command_ping(self.api.current_tab().jid)
 
     @command_args_parser.raw
     def command_muc_ping(self, arg):
@@ -124,10 +125,13 @@ class Plugin(BasePlugin):
             return
         user = self.api.current_tab().get_user_by_name(arg)
         if user:
-            jid = safeJID(self.api.current_tab().name)
+            jid = self.api.current_tab().jid
             jid.resource = user.nick
         else:
-            jid = safeJID(arg)
+            try:
+                jid = JID(arg)
+            except InvalidJID:
+                return self.api.information('Invalid JID: %s' % arg, 'Error')
         self.command_ping(jid.full)
 
     @command_args_parser.raw
diff --git a/plugins/reorder.py b/plugins/reorder.py
index 7308196d..32fa6639 100644
--- a/plugins/reorder.py
+++ b/plugins/reorder.py
@@ -112,7 +112,7 @@ def parse_runtime_tablist(tablist):
         i += 1
         result = check_tab(tab)
         if result:
-            props.append((i, '%s:%s' % (result, tab.name)))
+            props.append((i, '%s:%s' % (result, tab.jid.full)))
     return props
 
 
diff --git a/plugins/replace.py b/plugins/replace.py
index 7e259dab..9646a817 100644
--- a/plugins/replace.py
+++ b/plugins/replace.py
@@ -102,11 +102,11 @@ def replace_random_user(message, tab):
     if isinstance(tab, tabs.MucTab):
         return random.choice(tab.users).nick
     elif isinstance(tab, tabs.PrivateTab):
-        return random.choice([JID(tab.name).resource, tab.own_nick])
+        return random.choice([tab.jid.resource, tab.own_nick])
     else:
         # that doesn’t make any sense. By why use this pattern in a
         # ConversationTab anyway?
-        return str(tab.name)
+        return tab.jid.full
 
 
 def replace_dice(message, tab):
diff --git a/plugins/server_part.py b/plugins/server_part.py
index 7a71d94b..f29b4099 100644
--- a/plugins/server_part.py
+++ b/plugins/server_part.py
@@ -39,7 +39,7 @@ class Plugin(BasePlugin):
         if not args and not isinstance(current_tab, MucTab):
             return self.core.command_help('server_part')
         elif not args:
-            jid = safeJID(current_tab.name).bare
+            jid = current_tab.jid.bare
             message = None
         elif len(args) == 1:
             jid = safeJID(args[0]).domain
@@ -60,6 +60,6 @@ class Plugin(BasePlugin):
         serv_list = set()
         for tab in self.core.get_tabs(MucTab):
             if tab.joined:
-                serv = safeJID(tab.name).server
+                serv = tab.jid.server
                 serv_list.add(serv)
         return Completion(the_input.new_completion, sorted(serv_list), 1, ' ')
diff --git a/plugins/tell.py b/plugins/tell.py
index 43a91d8b..614c1ef5 100644
--- a/plugins/tell.py
+++ b/plugins/tell.py
@@ -75,7 +75,7 @@ class Plugin(BasePlugin):
         if not self.tabs.get(tab):
             self.api.information('No message queued.', 'Info')
             return
-        build = ['Messages queued for %s:' % tab.name]
+        build = ['Messages queued for %s:' % tab.jid.bare]
         for nick, messages in self.tabs[tab].items():
             build.append(' for %s:' % nick)
             for message in messages:
diff --git a/plugins/time_marker.py b/plugins/time_marker.py
index bd6af1c4..76f7e589 100644
--- a/plugins/time_marker.py
+++ b/plugins/time_marker.py
@@ -36,7 +36,7 @@ from datetime import datetime, timedelta
 class Plugin(BasePlugin):
     def init(self):
         self.api.add_event_handler("muc_msg", self.on_muc_msg)
-        # Dict of MucTab.name: last_message date, so we don’t have to
+        # Dict of MucTab.jid.bare: last_message date, so we don’t have to
         # retrieve the messages of the given muc to look for the last
         # message’s date each time.  Also, now that I think about it, the
         # date of the message is not event kept in the Message object, so…
@@ -66,8 +66,8 @@ class Plugin(BasePlugin):
                 res += "%s seconds, " % seconds
             return res[:-2]
 
-        last_message_date = self.last_messages.get(tab.name)
-        self.last_messages[tab.name] = datetime.now()
+        last_message_date = self.last_messages.get(tab.jid.bare)
+        self.last_messages[tab.jid.bare] = datetime.now()
         if last_message_date:
             delta = datetime.now() - last_message_date
             if delta >= timedelta(0, self.config.get('delay', 900)):
diff --git a/plugins/vcard.py b/plugins/vcard.py
index 643dd569..09dcda28 100644
--- a/plugins/vcard.py
+++ b/plugins/vcard.py
@@ -273,7 +273,7 @@ class Plugin(BasePlugin):
         if arg:
             self.command_vcard(arg)
             return
-        self.command_vcard(self.api.current_tab().name)
+        self.command_vcard(self.api.current_tab().jid.full)
 
     @command_args_parser.raw
     def command_muc_vcard(self, arg):
@@ -282,10 +282,12 @@ class Plugin(BasePlugin):
             return
         user = self.api.current_tab().get_user_by_name(arg)
         if user:
-            # No need to use safeJID here, we already know the JID is valid.
-            jid = JID(self.api.current_tab().name + '/' + user.nick)
+            jid = self.api.current_tab().jid.bare + '/' + user.nick
         else:
-            jid = safeJID(arg)
+            try:
+                jid = safeJID(arg)
+            except InvalidJID:
+                return self.api.information('Invalid JID: %s' % arg, 'Error')
         self._get_vcard(jid)
 
     @command_args_parser.raw