I am new to Ubuntu, so apologies upfront if my terminology is not accurate.
Seeing that the clock menu allows for Evolution Mail and Calendar to show its calendar part, I set it up using my CalDAV account calendars of Mac OS X 10.6 Server I am running. At first, it appears that it worked, but once I was happy about how all is set up (e.g. installing other applications, etc.), I degraded my user to be a standard user (having another user as an admin if required) to increase security.
When calling up Evolution Mail and Calendar, it all seems to still look fine. However, clicking the clock menu, it does not show the events any more, but even worse, once having clicked there, all events within the main application disappear as well. I can restart the application to reproduce the issue every time.
Is there a setting or config file I need to touch?
As a side note:
The main application occasionally (most-likely the first time after logging in to the account) repeatedly asks for the credentials of the "default calendar" with multiple password windows popping up on top of each other. However, neither did I change the password, nor did I remove the passwords from Evolution. Quitting and re-opening Evolution typically fixes it. Just mentioning this as it may be related.