Ah... So I am not necessarily going mad! At one point yesterday I noticed I am standing next to a tree, and I ran away screaming!
But I wasn't attacked by roots and trees at all in Old Forest anymore. I could have been ready to bet my head that the roots weren't yellow (aka neutral) before, and you couldn't take a step inside the forest without being stunned by trees/roots/grass while the local wolf-pack decided to eat you for lunch...
The Old Forest almost felt pleasent... Not the scary place where I did crap my pants every five minutes (ie about 15 seconds before the local wildlife turned me to fertilisers). It has surely lost some of its charm now. Altough I may finally be able to complete the deed to find all the forest-flowers now