diff --git a/50_bubble.py b/50_bubble.py

index 5238cde..823df76 100644

--- a/50_bubble.py

+++ b/50_bubble.py

@@ -18,7 +18,7 @@ from utils import *

from worker import *





-version = '9.0'

+__version__ = '9.1'





class Bubble:

diff --git a/model.py b/model.py

index e710cdb..52dc07a 100644

--- a/model.py

+++ b/model.py

@@ -514,7 +514,7 @@ class Post:

     self.parent = parent

     self.user = user

     self.issueid = issueid

- self.title = title

+ self.title = title if title is not None else ''

     self.flags = flags

     self.is_draft = is_draft

     self.is_pinned = is_pinned

@@ -1467,6 +1467,7 @@ class Database:



 def create_post(self, user: User, subspace_id: int, parent=0, title=''):

     assert type(user) is User

+ if title is None: title = ''



     # Unmoderated subspaces become locked.

     subspace = self.get_subspace(id=subspace_id)