First the images: the http://img15.imageshack.us/img15/2156/screenshot0fy.jpg, the http://img16.imageshack.us/img16/9617/screenshot1gs.jpg. The"detail" is indeed the big ghost tree in the reflex. Shouldn't be there, at least not in that position/angle. Other images I've seem in other mods in previuos playtroughs was always trees or foliage, blocky and gigantic ones (as ugly as one can imagine). Not very candyeye in the time,, for now with LW not seem the blocky ones yet, only... the dreamer, distracting, and from another dimension placed mirror trees.

The big question is: any setting/mod/tweak that we can use so that it never again happen?

Everytime it happen my char start looking for something that isn't there... maybe someone can help her? :angel:

Run TES4LODGen ?

I take it you've enabled tree reflections in the INI? If so that will happen. Billboard trees don't reflect so only real trees do. The game only renders normal trees when you're a cell or two away, which gives that pop in effect.