Fantastic and Enchanted Trees : Shader Error

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The new -Fantastic and Enchanted Trees- by JeffersonAF has a shadererror.

The renders, in a very strong way tree 1-3, but the other trees too, show many many

white points. Its no problem of the light. It occurs with every light.

On the picture you see 2 trees in the same rendering after 800 iterations.

On the right the original treeshader, on the left after changing many shadersettings by me.