I just hope the next patch will recover ALL our explored maps. I hope they wont tell us that the next patch wont make it happen again, from now on, but we'll have to rediscover all to get a map. That would be pretty bad and for me, 80 hours or so throw out the window. They have to find something to get rid of this black and retrieve our explored areas. In this case with this game it's much like a "I want my 80 hours back" scenario instead of a "I want my money back". Now don't get me wrong, Divine Divinity is the best PC game since Diablo 2, but the fun goes away when you restart your game all the time because of a crash.
My 2 cents