I am back from 2 weeks vacation and when I fired the first print I noticed that it stretches in the Z direction. After printing a 20x20x20 cube (x,y,z), I got 20x20x22 .... while before it was 20x20x20! Now this is weird. I changed nothing, no fw or setting changes. Only thing that changed is the layer (I am printing 0.15 instead of 0.25), but I am now printing at the original layer thickness. Even if I expect the same result. Anybody here has a clue what is going on??