Not sure if it should go here or in Bug Reports but I'm having problem with Black Box Zakum (I should probably mention I'm running on a Mac). It's not the GFX, since I get black boxes every time Zakum does magic damage/casts a map-wide spell, and I'm dc-ing about 2 minutes into the Zrun, even before anything gets killed. Has happened twice now. The dc is a complete shutdown of the MapleRoyals app by the way. Anyone knows of a fix?
Sounds a lot like this. It's been going on for quite awhile; the only known "fix" is running on windows parallels.