- made shadedisplist not free all object displist data...

this messed with data caches which messed with assumptions made
   by drawing code (and was just silly not to mention). here
   be dragons...

source/blender/src/drawobject.c

@@ -1783,7 +1783,7 @@ static void draw_mesh_fancy(Object *ob, DerivedMesh *baseDM, DerivedMesh *realDM
 			dl = ob->disp.first;
 			if (!dl || !dl->col1) {
 				shadeDispList(ob);
-				dl = ob->disp.first;
+				dl = find_displist(&ob->disp, DL_VERTCOL);
 			}
 			obCol1 = dl->col1;
 			obCol2 = dl->col2;