It works fine concerning the combat, Paul, but something else went wrong:
The Screenshots below are both from the same position in game, 6a is from version 239, 6b is from version 279. There is a graphic error in the center of the 3d viewport. I could imagine it has something to do with the changes you made concerning wall handling between 239 and 279..
I do not yet understand why the graphic error occurs at that spot...
EDIT: I found additional graphic errors for other walls, but it seems that in all cases only the most distant walls are not working perfectly.