Glad you like it! Yeah for now the tiling only works properly if the aspect ratio between height & width is an integer. So like 200x400, 200x600, 300x100, etc. To fix that I would have to use another tiling method, but haven't found that yet.
Weird, it doesn't happen any more to me. I think the first time I used it it disabled Dust every time I turned tiling off. Go figure. Thanks anyway, sorry for the false alarm!