Appointments get invisible when toggling calendar view (month, week, work week, day) in evolution

Bug in up-tp-date (as of today) Oneiric Beta. Exchange 2010 Server as only configured account:

When toggling the view (e.g. from month to calendar week), the existing appointments get invisible. The follwoing warnings are displayed in the console:

(evolution:2725): libecal-WARNING **: Failed to dispose cal view: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Keine derartige Schnittstelle »org.gnome.evolution.dataserver.CalendarView« des Objekts im Pfad /org/gnome/evolution/dataserver/CalendarView/2714/3

(evolution:2725): libecal-WARNING **: Failed to dispose cal view: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Keine derartige Schnittstelle »org.gnome.evolution.dataserver.CalendarView« des Objekts im Pfad /org/gnome/evolution/dataserver/CalendarView/2714/7

(evolution:2725): libecal-WARNING **: Failed to dispose cal view: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Keine derartige Schnittstelle »org.gnome.evolution.dataserver.CalendarView« des Objekts im Pfad /org/gnome/evolution/dataserver/CalendarView/2714/5
(evolution:2725): calendar-gui-DEBUG: get_view_cb: Failed to get view: Keine derartige Schnittstelle »org.gnome.evolution.dataserver.Calendar« des Objekts im Pfad /org/gnome/evolution/dataserver/Calendar/2714/4
(evolution:2725): calendar-gui-DEBUG: get_view_cb: Failed to get view: Keine derartige Schnittstelle »org.gnome.evolution.dataserver.Calendar« des Objekts im Pfad /org/gnome/evolution/dataserver/Calendar/2714/5
(evolution:2725): calendar-gui-DEBUG: get_view_cb: Failed to get view: Keine derartige Schnittstelle »org.gnome.evolution.dataserver.Calendar« des Objekts im Pfad /org/gnome/evolution/dataserver/Calendar/2714/2

Terminating evolution and restarting solves the problem until next toggle of calendar view.

There seems to be a number of other calendar related bugs, but they are hard to nail down and analyze due to this bug!

$ lsb_release -rd
Description: Ubuntu oneiric (development branch)
Release: 11.10

$ apt-cache policy evolution
evolution:
  Installiert: 3.1.92-0ubuntu1
  Kandidat: 3.1.92-0ubuntu1
  Versionstabelle:
 *** 3.1.92-0ubuntu1 0
        500 http://de.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: evolution 3.1.92-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Tue Sep 27 11:49:00 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: evolution
UpgradeStatus: No upgrade log present (probably fresh install)