rednotebook segfault consistently when scrolling the calendar

[GridCube]

Steps to reproduce:

1) open rednotebook, i use it to autolaunch with rednotebook -m
2)use the scroll wheel over the calendar
3)...
4) CRASH.

This is the terminal log:
:~$ rednotebook -m
INFO Writing log to file "/home/gridcube/.rednotebook/rednotebook.log"
INFO MathJax location: http://cdn.mathjax.org/mathjax/latest/MathJax.js
INFO Running in portable mode: False
INFO First Start: False
INFO RedNotebook version: 1.6.0
INFO System info: machine: i686, platform: Linux-3.2.0-32-generic-i686-with-Ubuntu-12.04-precise, processor: i686, python_version: 2.7.3, release: 3.2.0-32-generic, system: Linux, GTK version: (2, 24, 10), PyGTK version: (2, 24, 0), Yaml version: 3.10
INFO Cloud ignore list: [u'edn139']
INFO Cloud include list: [u'algo', u'as\xed', u'd\xeda', u'hoy', u'otro']
INFO Using zeitgeist: False
INFO Opening journal at u'/home/gridcube/.rednotebook/data'
INFO Connected Signals: [1, 2, 3, 6, 15, 20]
/usr/share/rednotebook/rednotebook/journal.py:601: GtkWarning: Invalid text buffer iterator: either the iterator is uninitialized, or the characters/pixbufs/widgets in the buffer have been modified since the iterator was created.
You must use marks, character numbers, or line numbers to preserve a position across buffer modifications.
You can apply tags and insert marks without invalidating your iterators,
but any mutation that affects 'indexable' buffer contents (contents that can be referred to by character offset)
will invalidate all outstanding iterators
  gtk.main()
Violación de segmento (`core' generado)

Im using Xubuntu 12.04 with xfce 4.8

Im assuming rednotebook its using the orage calendar, because the skin for it its the same as the system one, so this is its version:
~$ orage --version
 Esto es orage, versión 4.8.3

 Distribuido bajo los términos de la licencia GPL de GNU.
 Compilado con GTK+-2.24.8, usando GTK+-2.24.10.
 Usa DBUS para importación.
 Usa libnotify.
 Usa archivado automático.
 Usando paquete del sistema operativo libical.

If you need something more please tell me and ill try to provide it.

[Jendrik Seipp (jendrikseipp)]

This is probably an error in an underlying library.