So far we've had 2 unscheduled maintenances and still this issue hasn't been adressed.
Of course we shouldn't expect to have it fixed within the Event period, but then at least give us the Upot
Hey, i have the same issue. You can solve it by pressing Control+alt+delete, and then go back to the maplestory window. In my case i was able to play the game again then. You will have to do this every time you get a black screen tho