I have used Thunderbird for years. Within the last couple of weeks I have noted 2 issues. '''1st''' is the calendar issue with Reminder function. Reminder that have been listed w/ reminders, and repeated, for awhile, suddenly don't have the REMINDERS activate. They have in the past. Now, old events with REMINDERS, don't have the reminders activating. Nothing on the event listing has changed. I have reentered the event listing with no success in getting the reminder to activate. Interestingly enough, it doesn't affect ALL the events: just some. Same with ALL NEW EVENTS. Sometimes the event reminder activates and sometime not. Checked all the settings, version is up to date. I'm flummoxed. '''2nd''' is addressing email. Names I have had in my address book for years, while coming in during auto-fill, are asterisked as ''not in the address book''. I have reentered an asterisked listing but it still shows as not in the address book. Once again, it doesn't affect all listing, just some. I haven't anything & the version is up to date. I've got a gremlin somewhere, but not adept enough to take a deep dive into operational settings.