We have several events which are repeated on different days/times, I have noticed since the 2.7.8 build that we have some incorrect dates showing when hovering over an event in the calendar view.
For example we have an event on the 10th September and another linked to the same details on the 18th September - both appear in the calendar and both are available to be booked...
However if I hover my mouse over the graphic for the event on the 18th - the pop-up detail window shows the 10th...