(post copied from Steam since I got no reply there)

After the 1.8 update, my map saves are being corrupted! 
1) The .png file for the custom map is not properly generated (it's only 2K big and shows no map preview, only black screen) and,

2) the preview window (mini map window) in the upper right hand corner is black upon loading the faulty map in the editor.

If I try to play it, the map will also load without the preview and the preview (mini map) is black in game as well (fyi, the zoom still works, but it's all black).

Any map created BEFORE the update will still load with the preview and the preview is available in game, but any map created or modified AFTER the update is now corrupted as described above. The new "Rise of the Terrans" DLC also did NOT fix this issue. 

I have already verified the files and reinstalled the game twice but that DID NOT fix the problem.

Update: I just installed the game on a DIFFERENT Computer - same problem, no mini maps for any map created or modified AFTER 1.8.

Same corrupt .png file for newly saved maps.

Note, this was a pure, unmodded, vanilla installation on a brandnew computer, so it's pretty clear that the problem is NOT on my end!

Please assist!