Cloth didn't update properly in particle mode. Don't understand why the particle mode check was there to begin with, but if removing it causes trouble later on some other solution can be figured out.

source/blender/blenkernel/intern/DerivedMesh.c

@@ -2077,7 +2077,7 @@ static void clear_mesh_caches(Object *ob)
 static void mesh_build_data(Scene *scene, Object *ob, CustomDataMask dataMask)
 {
 	Object *obact = scene->basact?scene->basact->object:NULL;
-	int editing = paint_facesel_test(ob)|(ob && ob->mode & OB_MODE_PARTICLE_EDIT);
+	int editing = paint_facesel_test(ob);
 	int needMapping = editing && (ob==obact);
 	float min[3], max[3];