As title. Just finished a graveyard level and every breakable one looked so wrong. :P
They have the green cracks like normal, so it took a close look to see why they looked funny. They were like the normal ones, but aside from the green cracks they were strangely without variance in shade or tone - just flat gray all over. At first I thought it was a lighting bug, but I'm guessing they're just plain gray rendered headstones with no texture I'm seeing...
this was a bug in the preview that affected all tombstones and some of the soil patches, guess the breakable ones werent fixed yet...