diff --git a/src/cutecoin/core/graph.py b/src/cutecoin/core/graph.py
index 0b78fdbfdfa6c49ed461016d065aef56834f5262..f76ccff75d0412592f89548794a2448dfabf172f 100644
--- a/src/cutecoin/core/graph.py
+++ b/src/cutecoin/core/graph.py
@@ -227,7 +227,7 @@ class Graph(object):
                     else:
                         current_validations = 0
                     members_pubkeys = yield from self.community.members_pubkeys()
-                    max_validation = self.community.network.fork_window(members_pubkeys) + 1
+                    max_validation = self.community.network.fork_window(members_pubkeys)
 
                     # Current validation can be negative if self.community.network.current_blockid.number
                     # is not refreshed yet
@@ -305,7 +305,7 @@ class Graph(object):
                     else:
                         current_validations = 0
                     members_pubkeys = yield from self.community.members_pubkeys()
-                    max_validations = self.community.network.fork_window(members_pubkeys) + 1
+                    max_validations = self.community.network.fork_window(members_pubkeys)
 
                     if max_validations > current_validations > 0:
                         if self.app.preferences['expert_mode']:
diff --git a/src/cutecoin/gui/views/wot.py b/src/cutecoin/gui/views/wot.py
index 64e803b5ffe567717d10ab41be63470f8c405661..cfa426ac44fb1bbd0a7ae47c1fcf9a93a92c8d70 100644
--- a/src/cutecoin/gui/views/wot.py
+++ b/src/cutecoin/gui/views/wot.py
@@ -203,7 +203,10 @@ class Node(QGraphicsEllipseItem):
         self.status_wallet = self.metadata['status'] & NODE_STATUS_HIGHLIGHTED
         self.status_member = not self.metadata['status'] & NODE_STATUS_OUT
         self.text = self.metadata['text']
-        self.setToolTip(self.metadata['tooltip'])
+        try:
+            self.setToolTip(self.metadata['tooltip'])
+        except TypeError:
+            raise
         self.arcs = []
         self.menu = None
         self.action_sign = None