Village Houses in fragments

Approached a village to find two of its buildings sliced neatly apart... I've seen buildings 'gouged out' before by having rendered in a place with complex terrain, but in this place there appears to be nothing in conflict with the houses... they simple end suddenly. Save game too large to upload, so made a recording instead... sorry about my singing... did not originally think I'd be posting it to you. < 1 min

http://www.youtube.com/watch?v=LaVNg1sGeU4