After Upgrade to 14.04 evolution freezes when switching to calendar...

[Ulrich Neu]

On Ubuntu 13.10 Evolution with EWS and other (imap) Accounts worked ok when switching from email to calendar view...
After Upgrade (distrinution upgrade) to 14.04 Evolution freezes when switching from any view to Calendar view...
However, some local Birthdays and some gmail entries are showing up and about 3 seconds after the whole window freezes and gets greyed...without showing anything from exchange calendar...
There are no console messages or /var/log/syslog messages...

$ lsb_release -rd
Description: Ubuntu 14.04 LTS
Release: 14.04

$ apt-cache policy evolution
evolution:
  Installiert: 3.10.4-0ubuntu1
  Installationskandidat: 3.10.4-0ubuntu1
  Versionstabelle:
 *** 3.10.4-0ubuntu1 0
        500 http://de.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

$ apt-cache policy evolution-ews
evolution-ews:
  Installiert: 3.10.2-0ubuntu2
  Installationskandidat: 3.10.2-0ubuntu2
  Versionstabelle:
 *** 3.10.2-0ubuntu2 0
        500 http://de.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[katanacb (katanacb)]

I also have the same problem. Same distribution, word-size, etc.

[Ulrich Neu (ulrich-neu)]

This fixed it for me...
sudo apt-get install --reinstall unity-control-center evolution-data-server-online-accounts evolution-data-server-goa
No idea why it broke and / or why this seems to fix it...