Hello everyone, "We" have a couple of pc's all running thunderbird. No problems at all except one pc: If the user sends an invitaition for an appointment it will get sent twice everytime. The first message is just the invitation and the second is "an appointment got updated" but nothing changed and this was obviously not caused by us (atleast not on purpose). In the calendar it's appearing all normal so it works just like it should but the recipient allways gets two e-mails which is quite confusing for him/her. Is this a known bug? TIA