User-Agent: Opera/9.80 (Windows NT 6.0; U; de) Presto/2.2.15 Version/10.10 Build Identifier: 0.6b1 I have two Google calendars (both under the same user name). I used these two calendars without problems under Thunderbird 2. Now under Thunderbird 3 with Lightning 1.0b1 and Google Provider 0.6b1 all calendar entries are displayed twice! That means, if I add a new entry to my first calendar this entry will be displayed twice in Lightning's calendar view. One displayed item is assigned to calendar 1 and the other to calendar 2. The same goes for all older entries. When I log in to Google via the web interface, everything is fine. The calendar items are only assigned to one calendar. Reproducible: Always Steps to Reproduce: 1. Create two Google calendars 2. Configure Google provider to access both calendars 3. Create a new calendar item in Thunderbird Actual Results: The item will be displayed twice assigned to both calendars. Expected Results: The item should only be displayed once and be assigned to only one calendar. This problem also exists in Lightning 1.0b2pre which I tried earlier. But it did not exist in previous versions.

Are both calendars cached? In this case it could be bug 479867.

You're right. Both calendars were cached. I removed that setting and now everything works fine. Sorry for the duplicate bug.