FSDT trees at LSZH

[swiss1]

I get a strange trees-contour effect at LSZH, (Latest updated Version , original textures, no resized; see pictures)

I am using a GeForce GTX 460/1024Mo Video card with te latest NV driver 301.42,(see my setting).
All other trees in my FS9 don't have this lightning effect.
Is this a driver effect or a FSDT trees-effect?

[virtuali]

It's more like a known FS9 problem in rendering alpha textures.