Same here on my DCE scandoubler. It is a problem with TFT's.
I am running my scandoubler to a 23 inch TFT and I had to auto adjust the image before it became good. And by good it is still not perfect, but the image is at least centered.
On a CRT the picture is crystal clear, not much you can do about it.
(Had the same problem with an Amiga 3000 on an old 15 inch TFT, the funny thing is my A1200 with DCE scandoubler wont output any image on the same 15 inch TFT).
