It works okay on 2.7.1., though the events list option seemed not to function well. I’m not sure what it was supposed to do, but the list just sat there, with no links, and no tooltip.
On 2.8, the events list is simply blank, and some of the lines on the tooltip for events in the calendar go outside of the box. Kind of leaves me in an odd place, with WP screaming at me to update (I thought I had turned that off, but there it is still), and plugins not quite up to the new regime. I will probably have to downgrade until things catch up.