It seems that Google have stepped up security and provider for Google Calendar requires a popup authentication like "Online Accounts".
As soon as I did authorise the calendar, I ended up with duplicate entries for each and every event in my calendar. They are not present in the Online version of the events.
How do I delete the cached copies on my PC without erasing the account settings?
1 Answer
It's a bug. Please look at and .
The author of the GData plugin is actively working to correct the problem, and given the track record of the plugin, I am sure he will.
I can confirm that removing the calendar from Thunderbird and adding it again seems to fix the problem (I am using the beta 1.0.1 from the aforementioned bug report).
