We have 2.1 and have a weird one that has started up recently, when you edit an appointment on an iPhone for example remove one recipient from the appointment it deletes the whole appointment. It takes a few minutes to do it but it does it without fail i've logged in as various users to test it, and as soon as you remove one recipient you wait a few minutes and then hey presto you get an email through saying the meeting has been cancelled?

Any ideas?

1: I guess I need to just restart the server to see? A bit unsubtle but maybe worth a try?