I've upgraded to the latest git, and something has changed with meetings. They appear correctly in the calendar, but I used to be able to open them and set the accept/decline as appropriate (it default to tentative accept for me). This change then made it back to exchange. Now I get a the same dialog box as I would if I had created the meeting - no change to accept/decline, nor to set reminders. Seems strange, as the old behaviour seemed to be the correct one (If I created teh meeting then I could change the time etc, but if I was an invitee then I could just accept/decline and set reminders. I could also see who had been invited, which is not there either.