I set up some custom (number of days in advance) calendar event reminders of my travel plans in my Google calendar via my cell phone. I have my google calendar linked to thunderbird on my pc. I had accepted the invitations before I left on my trip. (looking at the details of the reminder it shows: "You have accepted this invitation.") I returned home from my trip and have several old flight reminders popping up in my pop-up box in thunderbird. I can try to dismiss them, by clicking on the dismiss button, but nothing happens. They do not disappear. But recurring birthday events from my google calendar, which are also in my T-bird calendar, are able to be dismissed from the T-bird Reminder pop-up box. A new event I created today in google calendar, flowed into T-bird with two custom reminders, but no event invite. (Is the issue with accepting invites?) I have tried unsubscribing and re-adding my google calendar, to no avail. I have tried to clear the T-bird startup cache, both with and without being subscribed to my google calendar, to no avail. Any help is appreciated by this confused user, thank you in advance.