Glen: I received this bug report from a friend and I'm wondering if this is fixed in one of your recent patches: "Create a weekly event (every Wednesday 3pm-4pm). Move (by drag-n-drop) one of the occurences to a Thursday and choose "only this item". If you select both Wed+Thu, the event is shown (correctly: on the Thu). But if you select only Thu, the event isn't shown. It's like the logic still associates this event with Wednesday when trying to figure out whether to show the event or not..."
No, it's not fixed. 1) In the Agenda week view, create a weekly event, Wed 3pm-4pm. Drag one instance to Thursday and choose "Only This Item". Use the date navigator to select a sequence of days containing or ending with the Thursday: the event is shown. Select a sequence of days beginning with the Thursday: the event is not shown. 2) As above, but select "Also Future Items". The Agenda shows the dragged instance on Thursday (if at all), but shows the original recurring event on future Wednesdays. The Month view does the right thing, so look for correct code there.