I *could* turn off all images, but that's not what I want to do. I can also make the white square go away by inverting all images (because then it becomes a black square!), but then all my other images are inverted, too.

What puzzles me is why I can't delete the white square - I can delete any DSS image, but this damned thing can't even be deleted in its folder - it's indestructible!

It's obviously not a serious issue, I don't spend all day looking at NGC 6755. It's just a strange thing.

Cheers,

Patrick